Answer:
190
Step-by-step explanation:
For every one of the 20 people, they shake hands with 19 others.
However, if A shakes hands with B, we double count because B shakes hands with A. Therefore we do 20*19/2 = 190.
6. RSTU and MNOP are similar. Find the scale factor of RSTU to MNOP. Then find the values of x and y. Show your work.
The scale factor is 1.4
the value of x is 4.2
the value of y is 130
How to find the scale factorThe scale factor is calculated by checking the proportions of the sides
Let the scale factor be k
10k = 14
k = 14/10
k = 1.4
solving for x
15 * k = 5x
15 * 1.4 = 5x
5x = 21
x = 21 / 5
x = 4.2
solving for y
y + 50 = 180
y = 180 - 50
y = 130
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Is this linear or non linear
Answer: No
Step-by-step explanation:
No, because it does not add the same value every time
Answer:
No
Step-by-step explanation:
The left side does add up the same each time (+1) but the right side does not as it adds +2 +2 +4 +8 +16
given a list of a finishing times at a marathon, which function should you use to rank each runner's place based on these finishing times?
Answer:
Below
Step-by-step explanation:
Rank in order of SHORTEST time to LONGEST time ....
shorter times mean the runner was faster to the finish line.
what is the correct solution for the arithmetic expression (2 8)/2*9/3 using the order of operations employed by oracle 12c when solving equations?
The correct solution to the arithmetic expression (2 8)/2*9/3 using the order of operations as employed by Oracle 12c when solving equations is 4.
According to the Order of Operations, the first step is to evaluate expressions inside parentheses, then perform any multiplications or divisions, and finally perform any additions or subtractions. In this expression, the first step would be to evaluate the expression inside the parentheses: (28)/2. This evaluates to 14.
Next, the expression becomes 14 * 9/3. According to the Order of Operations, we need to perform the multiplication first, so 14 * 9 = 126. Finally, we perform the division: 126/3 = 42.
So, the correct solution to the expression (2 8)/2 * 9/3 is 42.
Order of operations is a set of rules used to determine the sequence in which arithmetic operations should be performed in a mathematical expression to obtain the correct result. The rules ensure that operations are performed in a consistent and predictable manner.
The order of operations is typically represented by the acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
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Find the domain of f(x) = -√√²-4.
Ox≥ 2 orx≤ - 2
Ο x >2
0x2 -2 or x ≤ 2
O all real numbers
The domain of the given function is x≤-2
What are functions?Function, in mathematics, is an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Given here: The function f(x)=-√(√-4x)²
Simplifying the expression we get
f(x)=-√(√-4x)²
f(x)= -√-4x
Case 1) If the domain of x is greater than 2 then we have
f(3)=-√-12 which is a complex number and thus is not possible.
Case2 id x≤-2
then we have
f(-2)=-√8 which is not complex
Thus the feasible domain of the function is given by x≤-2
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Calculate the area of triangle cde with altitude ef, given c (3, −2), d (−1, 2), e (2, 3), and f (0, 1). 4 square units 6.2 square units 8 square units 8.7 square units
The area of triangle cde with altitude ef is 8 square units. This is calculated by finding the height from point "e" to "f", and the base from point "c" to "d", and then using the formula: Area = (base * height) / 2. The answer is 8 square units.
The area of a triangle can be calculated using the formula:
Area = (Base x Height) / 2
To find the height, we need to find the distance between the point where the altitude intersects the base (in this case, point "f" on the y-coordinate of point "e"), and the other two points of the triangle (in this case, "c" and "d").
The equation for a line in the form y = mx + b can be used to find the y-coordinate of point "f". Using the coordinates of points "c" and "e", the slope can be found by:
m = (3 - (-2)) / (2 - 3) = -1
The y-intercept can be found using the coordinates of point "c" and the slope:
b = -2 - (3 * -1) = 1
So the equation of the line that passes through points "c" and "e" is:
y = -x + 1
We can now use this equation to find the y-coordinate of point "f":
y = -x + 1
y = -0 + 1
y = 1
The height of the triangle is now the distance between points "e" and "f":
height = |3 - 1| = 2
The base of the triangle can be found by taking the distance between points "c" and "d":
base = |(-1) - (3)| = 4
So the area of the triangle is:
Area = (base * height) / 2
Area = (4 * 2) / 2
Area = 8
The area of the triangle is 8 square units.
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The line representing the equation part of the constraint 7x1 + 4x2 s 28 goes through the following two points a) (4,0) and (7,0). b) (0, 4) and (7,0). c) (4,0) and (0,7). d) (0, 4) and (0,7). e) none of the above
The required line representing the equation part of the constraint is go through (0, 4) and (7,0).
What is equation?The definition of an equation in algebra is a mathematical statement that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two equations 3x + 5 and 14, which are separated by the 'equal' sign.
According to question:The line representing the equation 7x1 + 4x2 = 28 is a boundary line that separates the feasible solutions from the infeasible solutions in a linear programming problem.
The line passes through two points, which can be determined by substituting the x1 and x2 values into the equation. By substituting the values (4,0) and (7,0) into the equation, we can see that both points satisfy the constraint.
This means that any point on the line also satisfies the constraint, and any point above or to the right of the line would be infeasible as they would not meet the requirement of the constraint.
Understanding the position and shape of the constraint lines is important in solving linear programming problems and finding the optimal solution.
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a store is offering a 20 percent discount on all items. The price of the hat after the discount is 18 dollars what was the original price and how do you find it
Answer: $22.50
Step-by-step explanation
In this case, x is what the original number was in case you didn’t know.
x - (x * 20/100) = 18
x -0.2x=18
0.8x=18
18/0.8=x
X = 22.5
HELP ASAP
A quilter created the following shape to use in a block for a new quilt.
A six-sided figure with a large base of 16 inches. The side to the right of the base is 9 inches. The small side parallel to the base is 6 and two fifths inches. There are two sides that form a point at a right angle. The smaller is 6 inches, and the larger is 7 and one-half inches.
What is the area of the shape for the quilt block?
ninety-four and one half in2
one hundred sixty-six and one half in2
189 in2
333 in2
The total area of the quilt as perceived is 101 square inches
How to determine the total area of the quilt?The six-sided figure is not given, however we can deduce the following parameters from the question:
The shape is made of a triangle and a trapezoid
The side lengths derived from the question are:
The triangle on top:
base: 6 inches and height: 7 inches
The trapezoid at the bottom:
Parallel sides: 16 inches and 9 inches with a height of 6.4 inches
So, we have the total area of the figure to be
Area of figure = 1/2 * 6 * 7 + 1/2 * (16 + 9) * 6.4
Area of figure = 101
Based on the deduced parameters, the total area is 101 square inches
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Write a conjecture that describes the pattern in each sequence. Then use your conjecture to find the next item in the sequence. 1, 10, 100, 1000
The conjecture that describes the pattern in each sequence is *10, the next item in the sequence. 1, 10, 100, 1000 is 10000.
What is a geometric sequence and how to find its nth terms?Suppose the initial term of a geometric sequence is a
and the term by which we multiply the previous term to get the next term is r
Then the sequence would look like
[tex]a, ar, ar^2, ar^3, \cdots[/tex]
(till the terms to which it is defined)
Thus, the nth term of such sequence would be T_n = ar^{n-1} (you can easily predict this formula, as for nth term, the multiple r would've multiplied with initial terms n-1 times).
Given;
The following sequence that can be used in our computation:
1,10,100,1000
In the above sequence, we can see that 4 is added to the previous term to get the current term
Using the above as a guide,
Next term = 1000*10
Evaluate
Next term = 10000
Therefore, the next term of sequence will be 10000.
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Triangle RST is shown in the coordinate plane. What are the coordinates of R'S'T' if the figure is reflected over the x-axis and translated down two units? Responses (1, 2), (1, 5), (6, 5) (1, 2), (1, 5), (6, 5), (1, -6), (1, -9), (6, -9) (1, -6), (1, -9), (6, -9) , (3, 2), (3, 5), (8, 5) (3, 2), (3, 5), (8, 5) ,(3, 4), (3, 7), (8, 7) (3, 4), (3, 7), (8, 7) ,
The reflected and then translated coordinates of the triangle are R'( 3,2), S'(3,5), and T'( 8, 5).
What is reflection?A sort of symmetry known as reflective symmetry occurs when one half of an object mirrors the other half. It also goes by the name "mirror symmetry."
For instance, both the left and right sides of a human face are typically the same. Most butterflies have identical wings on their left and right sides.
The given points of the triangle are R(3,-4), S(3,-7), and T(8,-7).
The reflected points of the triangle will be:-
R(3,-4) = R'( 3, 4)
S(3,-7) = R'(3,7)
T(8,-7) = R(8, 7)
The translated points by 2 units down will be:-
R'( 3, 4) = R''( 3, 2)
R'(3,7) = S''( 3, 5)
R(8, 7) = T''(8,5)
Therefore, the reflected and then translated coordinates of the triangle are R'( 3,2), S'(3,5), and T'( 8, 5).
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Answer:
so the other guy can get brainlyest
Step-by-step explanation:
pls like and rate
One way to compute a 15% tip for a bill is to multiply it by 0.15.
A restaurant bill was $42.40.
what do i do ??????
im in middle school
The amount of tip will be $6.36. And the total amount of the restaurant bill with the tip will be $48.76.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates for one hundred percent. It is symbolized by the character '%'.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
One way to compute a 15% tip for a bill is to multiply it by 0.15. A restaurant bill was $42.40.
Then the amount of tip is given as,
Tip amount = $42.40 x 0.15
Tip amount = $6.36
The total amount is given as,
Total amount = $42.40 + $6.36
Total amount = $48.76
The amount of tip will be $6.36. And the total amount of the restaurant bill with the tip will be $48.76.
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A survey of 1,000 people was done. 80% of the people surveyed knew all 50 states in alphabetical order. How many of the 1,000 people did not know all 50 states in alphabetical order?
Answer: 200
Becase 80% of 1000 is 800 and 1000- 800 =200
A law firm is going to designate associates and partners to a big new case. The daily rate charged to the client for each associate is $600 and the daily rate for each partner is $1200. The law firm assigned a total of 13 lawyers to the case and was able to charge the client $12000 per day for these lawyers' services. Graphically solve a system of equations in order to determine the number of associates assigned to the case, x, and the number partners assigned to the case, y. ( solve by graphing )
The number of associates assigned to the case and the number of partners assigned to the case is 6 and 4.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
Given that,
The daily rate charged to the client for each associate is $600 and the daily rate for each partner is $1100.
The law firm assigned a total of 10 lawyers to the case and was able to charge the client $8000 per day for these lawyers' services.
Here we assume number of associate be x and no of partners be y.
Based on the above information, the calculation is as follows:
x + y = 10
x = 10 - y
Now put the value of x in the below equation
600x + 1100y = 8,000
600 (10 - y) + 1100y = 8000
6000 - 600y + 1100y = 8000
2000 = 500y
y = 4
So x = 10 - 4
= 6
Hence, The number of associates assigned to the case and the number of partners assigned to the case is 6 and 4.
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Are the triangles similar, if so what postulate can you use to prove similarity? *
Answer:
AA postulate
Step-by-step explanation:
We can prove as:
We have vertically opposite angles, which are equal
Also, we have been given two corresponding equal angles, thus we can prove using AA similarity postulate.
Landscaping A landscaping project requires that you estimate the length of a drain line. You pace off the length as being 24 strides long. You know from prior experience that each of your strides is of a yard. What would be your estimate of the length of the drain line?
3
The solution is the length of the drain line is 20 ft.
What is multiplication?In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.
here, we have,
You pace off the length as being 24 strides long.
we know, 1 strides = 2.5 feet
i,e, we have, 60 ft.
now,
You know from prior experience that each of your strides is of a yard.
again, 1 yard = 3 ft.
so, the length of the drain line = 60/3
= 20 ft.
Hence, The solution is the length of the drain line is 20 ft.
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select all answer choices that show a correct comparison A 1/2 < 1/5 B 3/5 > 3/10 C 2/8 < 1/4 D 5/6 > 2/5 E 5/10 > 2/5 HELP WANTED
The true inequalities are:
B) 3/5 > 3/10
D) 5/6 > 2/5
E) 5/10 > 2/5
Which options show a correct compairison?Here we want to see which ones of the given inequalities are true.
Remember that an inequality:
A > B
Is true if the value of A is larger than the one of B.
From the given inequalities, the true ones are:
B) 3/5 > 3/10
That is true because the denominator is smaller on the left side.
D) 5/6 > 2/5
We can rewrite these fractions at:
25/30 > 10/25
E) 5/10 > 2/5
2.5/5 > 2/5
This is also true.
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Wich are the dividers of 25? And 120 and 71 and 24
Answer:
the dividers of 25 are: 1, 5, and 25.
the dividers of 120 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, and 120.
the dividers of 71 are: 1, 71.
The dividers of 24 are: 1, 2, 3, 4, 6, 8, 12, and 24.
Step-by-step explanation:
The Fairfax Tigers are having team shirts made. One option is to pay Rhianna's Tees a $20 setup fee and then buy the shirts for $8 each. Another option is to go to City Printing, paying $30 for a setup fee and an additional $6 per shirt. The team parent in charge of the project notices that, with a certain number of shirts, the two options have the same cost. What is the cost?
The cost when the two options are the same is equal to $60.
How to determine when the cost of the two shirt options would be the same?Based on the information provided above, Rhianna's Tees charges a $20 setup fee and then to buy the shirts for $8 each. The total cost, y, can be represented by this equation:
y = 8x + 20 ....equation 1.
where:
x represents the number of shirts.
For the second option, the total cost of the shirt can be represented by this equation:
y = 6x + 30 ....equation 2.
By equating equation 1 and equation 2, we have the following:
8x + 20 = 6x + 30
8x - 6x = 30 - 20
2x = 10
x = 5
Now, we can determine the cost as follows;
y = 8x + 20
y = 8(5) + 20
y = 40 + 20
y = $60.
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Find the equation of the line represented by the graph below.
y = x+
The equation of the line represented by the graph is y = -x/3 + 5.
What is the point-slope form?Mathematically, the point-slope form of a straight line can be calculated by using this mathematical expression:
y - y₁ = m(x - x₁) or y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)
Where:
m represents the slope.x and y are the points.(0,5)(6,3)
Based on the information provided, we can logically deduce the following data points on the line:
Points on x-axis = (0, 6).Points on y-axis = (5, 3).At point (0, 5), a linear equation of this line can be calculated in slope-intercept form as follows:
y - 5 = (3 - 5)/(6 - 0)(x - 0)
y = -2/6(x - 0) + 5
y = -x/3 + 5
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HELP PLS !!!!
5. Explain how iteration and using a recursive formula are similar.
1. iteration is similar to using a recursive formula because you use the output from the previous calculation as the input to find the next answer
2. Iteration uses the subsequent value to find the previous value, and recursive formulas require a sequence to work
3. Iteration is similar to using a recursive formula because both processes use the same initial value.
4. Both iteration and recursive formulas generate only arithmetic sequences.
Answer:
1) Iteration is similar to using a recursive formula because you use the output from the previous calculation as the input to find the next answer.
Iteration is similar to using a recursive formula because you use the output from the previous calculation as the input to find the next answer. The correct option is A.
What are iteration and recursive formulas?The process of defining a problem or the solution to a problem in terms of a simpler version of itself is known as recursion. There are two kinds of recursion. The first is direct recursion, and the second is indirect recursion.
As a result, recursion is a method of problem-solving in which the solution is dependent on solutions to smaller instances of the same problem.
Therefore, the correct option is A, which is Iteration is similar to using a recursive formula because you use the output from the previous calculation as the input to find the next answer.
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A regular polygon has an interior angle of 172°. Find the exterior angle and work out how many sides it has.
Answer:
Hi my dream princess
A regular polygon with an interior angle of 172° has the following characteristics:
Exterior angle: 360° / number of sides - interior angle.
Number of sides: 360° / exterior angle.
Using this information, we can find the exterior angle and the number of sides:
Exterior angle: 360° / number of sides - 172°.
Number of sides: 360° / (360° / number of sides - 172°).
Solving for the number of sides, we have:
Number of sides: 360° / (360° / number of sides - 172°)
= 360° / (360° / number of sides) - 172° / (360° / number of sides)
= number of sides - 172° / (360° / number of sides)
= number of sides (1 - 172° / 360°)
= number of sides * 188° / 360°.
Since we have a fraction involving a fraction, we can simplify:
Number of sides = number of sides * 188° / 360°
= number of sides * 47° / 90°
= number of sides * 47 / 90.
Since 47 and 90 are both divisible by 47, we can simplify further:
Number of sides = number of sides * 47 / 90
= number of sides * 1 / 2.
Therefore, the regular polygon has 2 sides and each exterior angle is 180°. The polygon is an isosceles triangle.
when constructing a confidence interval for a population proportion, we check that the sample size is less than 10% of the population size. a. why is it necessary to check this condition? b. what happens to the capture rate if this condition is violated?
(a) A reasonable guideline for ensuring that the sample size is small enough to give credible findings is to confirm that the sample size is less than 10% of the population size.
(b) The confidence interval may not correctly reflect the genuine population proportion, resulting in incorrect inferences and actions based on the findings.
(a)
This condition must be checked since the sample size must be much less than the population size to ensure that the sample is representative of the population. A high sample size may not fully represent the population, resulting in biased results.
(b)
If the sample size exceeds 10% of the population size, the "10% criterion" is violated. When this requirement is broken, the capture rate may rise, but the accuracy of the confidence interval may fall. As a result, the confidence interval may grow broader and less reliable in capturing the genuine population percentage.
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What is the total surface area of the square pyramid below?
The total surface area of the square pyramid is; 336 ft²
How to find the total surface area of the square pyramid?To find the total surface area of the square pyramid, we will first of all calculate the areas of the individual shapes into which it is broken down and then add up to get the total surface area.
Area of a triangle is given by the formula;
A = ¹/₂ * base * height
Thus, area of 4 triangles here is;
A = 4(¹/₂ * 12 * 8)
A = 192 ft²
Area of square = 12 * 12
= 144 ft²
Thus;
Total surface area of square pyramid = 192 + 144
= 336 ft²
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Which two square roots are used to estimate Start Root 47 End Root?
Answer:4
Step-by-step explanation: answer 4
You are having a conference call with the CEO of a paper company. You have interpreted the number of trees cut down versus profit as the function P(x) = x^3 - 5x^2 − 2x + 24.
A.) how many zeros/roots will we have? Explain how you know. (1 points)
B.) What are the x-intercepts/roots/zeros? Show your work for finding these... (This should take some work to find! We did this in section 4.6) (5 points)
C.) What is the y-intercept of the graph? Explain how you know. (1 points)
D.) Describe the end behavior of this graph (3 points)
a) The number of zeros of the function is given as follows: 3.
b) The x-intercepts of the function are given as follows: x = -2, x = 3 and x = 4.
c) The y-intercept of the graph is given as follows: y = 24.
d) The end behavior of the function is given as follows: As x -> -∞, f(x) -> -∞, and as x -> ∞, f(x) -> ∞.
How to obtain the features of the function?The function is of the third degree, as it has a higher exponent of 3, hence the number of zeros is of 3.
The x-intercepts are the values of x for which the graph of the function crosses the y-axis, hence they are given as follows:
x = -2, x = 3 and x = 4.
The y-intercept is the graph of y when the graph of the function crosses the y-axis, hence it is given as follows:
y = 24.
The end behavior is given as follows:
Decay to left: As x -> -∞, f(x) -> -∞.Increases to right: as x -> ∞, f(x) -> ∞.More can be learned about functions at https://brainly.com/question/24808124
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Look at picture below!
The cardinal number of the set , n ( D ) = 1 .
What is the cardinal number of a set ?The natural numbers that are used to determine the cardinality of sets are extended into cardinal numbers . The shortened term "cardinals" is frequently used to describe cardinals. The number of objects contained within a finite set , known as the cardinality , is equal to a natural number .
The cardinal number here would therefore be the number of unique values which is only 1 and that 1 is eight .
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help please will give brainliest no question
Answer:
The penguins swan 2 2/5 miles in one hour
Step-by-step explanation:
The dog shelter has Labradors, Terriers, and Golden Retrievers available for adoption. If P(terriers) = 15%, interpret the likelihood of randomly selecting a terrier from the shelter.
Likely
Unlikely
Equally likely and unlikely
This value is not possible to represent probability of a chance event
Answer:
likely
Step-by-step explanation:
The value of 15% does not represent the probability of randomly selecting a terrier from the shelter. Probability is a measure of the likelihood that a certain event will occur, and 15% does not provide enough information to calculate a probability.
what information can you gather from the standard deviation, particularly as it pertains to the percentage of normal distribution?
The standard deviation of a data set provides information about the spread or dispersion of the data around the mean.
It helps to determine the percentage of normal distribution in the data. If the standard deviation is small, it indicates that the data is tightly clustered around the mean and a high percentage of the data falls within a few standard deviations of the mean. On the other hand, if the standard deviation is large, it suggests that the data is more spread out and a smaller percentage of the data falls within a few standard deviations of the mean.
In a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations. So, the standard deviation provides insight into the proportion of data points that are close to the mean, and therefore, the shape of the distribution.
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