30 points can someone help please

To describe the number of vocabulary words that are understood by the first-graders is better to use the mode.

Based on this, the factor to be considered to know the number of words first-graders know is the mode because this is the most common number of words and the most accurate information.

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Answer:

d. 35

Step-by-step explanation:

y = 35x + 40

The slope is 35 as 'm' is the slope of the equation

LMK IF IT WAS RIGHT!!

Answer:

D (35)

Step-by-step explanation:

The statement that is true about the proportional relationship is that; The time required to paint a house varies directly with the number of painters.

The parameters are;

p represents the number of painters.

h represent the number of hours required to paint the house

In this case, the  number of hours will be the output variable while the number of painters will be the input variable. Thus, we will have the relationship;

h = kp

where k is the constant of proportionality

When 2 painters are used, it takes 15 hours to paint and as such;

k = 15/2

k = 7.5 hours per painter

When 6 painters are used, it takes 5 hours to paint. Thus;

k = 5/6

k = 0.833 hours per painter

Thus, we can say that the time required to paint a house varies directly with the number of painters.

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Answer:

Step-by-step explanation:

To find the annual rate given the rate per compounding period, we need to convert the rate from the compounding period to the annual period. In this case, the rate is given as 0.425% per month.

One way to convert the rate is to multiply it by the number of compounding periods in a year:

r = 0.425%/month * 12 months/year

r = 5.1%/year

Therefore, the annual rate, r, is 5.1%.

The value of the expression for x=-3 is 78.

An expression is a combination of terms that are combined by using mathematical operations such as subtraction, addition, multiplication, and division.

The given expression is 6(2x²-5).

Here, x=-3

Substitute x=-3 in the expression 6(2x²-5), we get

6(2(-3)²-5)

= 6(18-5)

= 78

Therefore, the value of the expression is 78.

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Answer:

If y=6 when x=3 find y when x =-33.

Step-by-step explanation:

86% of 22 is the correct answer

The equivalent expression is x + 3 + 4/(x - 1)

Option A is the correct answer.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

(x² + 2x + 1) / (x - 1)

Now,

x² + 2x + 1

= x² + (1 + 1)x + 1

= x² + x + x + 1

= x(x + 1) + 1(x + 1)

= (x + 1)(x + 1)

= (x + 1)²

Now,

(x² + 2x + 1) / (x - 1)

= (x + 1)² / (x - 1)

Now,

x + 3 + 4/(x - 1)

((x - 1)x + 3(x - 1) + 4) / (x - 1)

= (x² - x + 3x - 3 + 4) / (x - 1)

= (x² + 2x + 1) / (x - 1)

Thus,

x + 3 + 4/(x - 1) is the equivalent expression.

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Vector identities can be derived using index notation. The following vector identities are to be proved: (iii) V - (V xa) = 0, (vii) V ab = (V a)b + a(V b).

Starting with the left-hand side:

V - (V x a) = V + (a x V) (by definition of cross product)

Using the vector triple product, a x (b x c) = (a . c) b - (a . b) c, we get:

V + (a x V) = V + (V . a) a - (V . a) a

= V (since the second term cancels out with the first term)

Thus, V - (V x a) = 0.

(vii) V ab = (V x (b x a))

Starting with the left-hand side:

V ab = V (ab)

Using the scalar triple product, a . (b x c) = (a x b) . c, we get:

V (ab) = (V x b) . (a x a)

= (V x (b x a)) (since a x a = 0)

Thus, V ab = (V x (b x a)).

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Answer:

infinitely many

Step-by-step explanation:

this equation is true for each and every value.

so its solutions are infinite

The present value of the cash flows is $30,030.78.

In order to determine the value today of the series of payments, the present value has to be determined. Present value is the sum of the discounted cash flows.

Present value = 5,100 / (1.079)^6 + 5,100 / (1.079)^7 + 5,100 / (1.079)^8 + 5,100 / (1.079)^9 + 5,100 / (1.079)^10 + 5,100 / (1.079)^11 + 5,100 / (1.079)^12 + 5,100 / (1.079)^13 + 5,100 / (1.079)^14 + 5,100 / (1.079)^15 + 5,100 / (1.079)^16+ 5,100 / (1.079)^17 + 5,100 / (1.079)^18 + + 5,100 / (1.079)^19 + + 5,100 / (1.079)^20 = $30,030.78

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Answer: $200,000

Step-by-step explanation:

The price of her home is $200,000.

The percentage is calculated by dividing the required value by the total value and multiplying by 100.

Example:

Required percentage value = a

total value = b

Percentage = a/b x 100

Example:

50% = 50/100 = 1/2

25% = 25/100 = 1/4

20% = 20/100 = 1/5

10% = 10/100 = 1/10

We have,

The closing costs run from 2% to 7% of the purchase price.

Approximate closing costs would range from $4,000 to $12,000.

Price of her home = x

This means,

2% of x =  4000

(2/100)x = 4000

(1/50)x = 4000

x = 4000 x 50

x = 200,000 ____(1)

7% of x = 12,000

(7/100)x = 12,000

x = (12,000 x 100)/7

x = 171428.57

x = 171429 _____(2)

Now,

From (1) and (2) we can say that,

x = $200,000

Thus,

$200,000 is the price of her home.

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The complete question:

The closing costs run from 2% to 7% of the purchase price.

Becky was told that based on the price of her home, her approximate closing costs would range from $4,000 to $12,000. How much was the price of her home?

the probability that x is 4 is given by the formula  P(x) = [tex](1 - p)^(x-1) * p[/tex]

The formula for the probability of a geometric distribution is [tex]P(x) = (1 - p)^(x-1) * p[/tex]

Given the probability of success (p) is 0.3, the probability of x being 4 would be:[tex]P(x) = (1 - 0.3)^(4-1) * 0.3[/tex]

P(x) = 0.0729 or 7.29%

The geometric distribution is a probability distribution for the number of failures before the first success in a series of independent trials.

In this problem, the probability of success (p) is 0.3 and the probability of failure (1-p) is 0.7.

Therefore, the probability that x is 4 is given by the formula  [tex]P(x) = (1 - p)^(x-1) * p[/tex]

Plugging in the values of p and x, we get:

[tex]P(x) = (1 - 0.3)^(4-1) * 0.3[/tex]

This simplifies to

P(x) = 0.0729 or 7.29%

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Answer:

-2/-3

Step-by-step explanation: Because -2/-3=2/3.

Z-scores are used to standardize a raw score by converting it into the number of standard deviations it is above or below the mean.

The formula to convert a raw score into a z-score is:

z = (X - Mean) / Standard Deviation

Where X is the raw score, Mean is the mean of the population, and Standard Deviation is the standard deviation of the population.

For z = 2.00:

z = (X - Mean) / Standard Deviation

X = (z * Standard Deviation) + Mean

X = (2.00 * 38.2) + 202 = 238.4 + 202 = 440.4 (rounded to nearest whole number = 440)

For z = -2.00:

z = (X - Mean) / Standard Deviation

X = (z * Standard Deviation) + Mean

X = (-2.00 * 38.2) + 202 = -76.4 + 202 = 125.6 (rounded to nearest whole number = 126)

So for z = 2.00, the corresponding test score is 440, and for z = -2.00, the corresponding test score is 126.

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Answer:

approximately $4,609,968.67

Step-by-step explanation:

To calculate the future value of a lump sum after compounding over a certain number of years with a specific interest rate, you can use the formula:

FV = PV * (1 + r/n)^(nt)

Where:

FV is the future value

PV is the present value (6500)

r is the annual interest rate (3.96%)

n is the number of times compounded per year (semi-annually, so 2)

t is the number of years (414)

Plugging in the values, you get:

FV = 6500 * (1 + 0.0396 / 2)^(2 * 414)

The future value of $6,500 in 414 years at an interest rate of 3.96% compounded semi-annually is approximately $4,609,968.67.

The two positive numbers are 1 and 1, depending on the given information.

Let first number be x. So, the second number is 1/x. Now, their sum is minimum, so representing the expression for given information -

Sum (x) = x + 1/x

Rewriting the expression -

Sum (x) = x + [tex] {x}^{-1} [/tex]

Finding the derivative

Sum' (x) = 1 + (-1) [tex] {x}^{-2} [/tex]

Sum' (x) = 1 + (-1)/[tex] {x}^{-1} [/tex]

Sum' (x) = (x² - 1)/x²

Now, to find the minimum -

x² - 1/x² = 0

Multiplying x² on Right Hand Side of the equation

x² - 1 = 0

Rewriting the equation

x = ± 1

As the numbers are positive, so x will be 1.

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The function shown in the graph must be the function f(x)=2×4ˣ

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: f(x)=abˣ and when x is equal to 0 then f(0)=2

also if x increases by the functions gets multiplied by 4

Thus if f(0)=2 then f(1)= 8 , f(2)=32

or the function can be rewritten as f(x)=2×4ˣ

Thus f(0)=2×4⁰

              =2

f(1)=2×4¹

Hence, The function shown in the graph must be the function f(x)=2×4ˣ

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Because it is typically too expensive and too time consuming, researchers often select a sample, a group of people that are representative of the larger population.

A sample is a smaller group of individuals selected from a larger population for the purpose of studying and making inferences about the population. Sampling is used when studying the entire population is not feasible due to limitations in time, resources, or practicality. The goal is to select a sample that accurately represents the population in terms of key characteristics such as age, gender, education level, etc. The sample must be representative of the population, meaning that it should accurately reflect the characteristics of the population. This is important because any biases or inaccuracies in the sample can lead to incorrect inferences about the population. A well-selected sample should also have a large enough size to provide meaningful results, yet not be so large that it becomes difficult to manage or too expensive to study.

In conclusion, sampling is a crucial step in research because it enables researchers to study a portion of the population, rather than the entire population, in order to make inferences about the larger group.

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The domain and range of a function is discussed above.

An function in mathematics defines a relationship between one variable (the independent variable {x})  and another variable (the dependent variable {y}). Example → y = f{x} = ax + b.

Given is the graph of the function as shown in the image.

Domain represents the set of values along the {x} - axis or the possible values of {x} for which f{x} exists.

Range represents the set of values along the {y} - axis or the possible existing values of f{x} for a specific value of {x}.

Therefore, the domain and range of a function is discussed above.

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Answer:

y = (2/3)x + 10

Step-by-step explanation:

To find the equation of the line in slope-intercept form, y=mx+b, we need to know the slope and the y-intercept. The slope, or m, is rise over run. To find slope, we need to look at 2 points. For this question, I will be using the points (0,10) and (30,30). The rise, or change in y value, is 20, while the run, or change in x value, is 30. This means our rise over run in 20/30, or 2/3. Now that we have established the slope, or m, let's find the y-intercept, or b. To do this, you just need to look at where the line passes through the y-axis. In the image, you can see the line passes through the y-axis as x=10, making our y-intercept, or b, 10. Using this information, we can now find the equation of the line:

y = mx + b

m = slope, 2/3

b = y-intercept, 10

y = (2/3)x + 10

So, the equation of the line is y = (2/3)x + 10

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Options C and D are subsets of R³, which are {(-5x,4x,3x)| x arbitary} and {(x,y,z)| x+y+x=0}

A) Correct. We have to check whether the potential subspace containing the zero vector is a great place to start on these sorts of problems. No zero vector so this is not a subspace.

B) This is a subspace. The set of solutions of a homogeneous linear system is always a subspace it is known as a "null space" of some corresponding linear transformation.

Let, [tex]M=\left[\begin{array}{ccc}2&9&0\\8&0&-5\\\end{array}\right][/tex]  then the set in B) is just Null(M). Again, Nullspaces are always subspaces.

Alternatively, you could solve the corresponding system Mx=0 and find the elements of that set  [tex]x=\left[\begin{array}{c}5/8&-5/36&1\\\\\end{array}\right][/tex]  for any choice of z∈R. So this

can be a set in the span of   [tex]x=\left[\begin{array}{c}5/8&-5/36&1\\\\\end{array}\right][/tex]

C) Correct. we can see a subspace because the elements are just multiples of (−5,3,4) and again spans are subspaces.

D) Correct. This can be a  subspace for the same reasons as part B.

E) Correct. Not a subspace. An easier counter-example: (1,1,1) is in there. But (−1)(1,1,1)=(−1,−1,−1) is not.

F) Not a subspace. (0,0,0)  is not in there.

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The items that are most likely to be measured in ounces are a Paper bag, a can of pop, and a table.

The weight of objects is typically measured in units of mass, such as grams or kilograms, or in units of weight, such as ounces or pounds. In general, smaller and lighter objects are measured in ounces, while heavier objects are measured in pounds or kilograms.

In this case, the paper bag, can of pop, and table are likely to be measured in ounces. These objects are relatively light and can be easily lifted and weighed on a scale, which would make it convenient to use ounces as a unit of measurement. On the other hand, a frying pan is likely to be a heavier object and would typically be measured in pounds or kilograms.

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1,3

Step-by-step explanation:

The percentage values are as follows: 75, 135, 60, 50, 245, 105, 175, 315, 450, 60, 125, 140, 280, 150, 320, 150.

A % is a relative figure that represents the hundredth part of any amount. One percent (symbolized 1%) is one hundredth part; consequently, 100 percent denotes the complete amount and 200 percent defines twice the supplied amount. percentage. Mathematics percentile is a related topic. A percentage is a fraction of a whole represented as a number between 0 and 100. Nothing is zero percent, everything is 100 percent, half of everything is fifty percent, and nothing is zero percent. To calculate a percentage, divide the share of the total by the total and multiply by 100.

Here,

1a. 150% of 50

=1.5*50

=75

1b. 150% of 90

=1.5*90

=135

2a. 100% of 60

=1*60

=60

2b. 50% of 100

=0.5*100

=50

3a. 350% of 70

=3.5*70

=245

3b.  150% of 70

=1.5*70

=105

4a. 350% of 50

=3.5*50

=175

4b.  350% of 90

=3.5*90

=315

5a.  450% of 100

=4.5*100

=450

5b. 200% of 30

=2*30

=60

6a. 250% of 50

=2.5*50

=125

6b. 350% of 40

=3.5*40

=140

7a. 350% of 80

=3.5*80

=280

7b. 150% of 100

=1.5*100

=150

8a. 400% of 80

=4*80

=320

8b. 300% of 50

=3*50

=150

The value of percent are: 75, 135, 60, 50, 245, 105, 175, 315, 450, 60, 125, 140, 280, 150, 320, 150.

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The angle measures for this problem are given as follows:

ADC is an isosceles triangle, with an angle of 44º, hence the base angles have the measure given as follows:

2x + 44 = 180. (sum of the internal angles of a triangle).

2x = 136

x = 136/2

x = 68º.

Hence the measure of angles ACB and BCD is of 34º, as the bisection divides the angle into two angles of equal length.

Considering the two base angles of 34º, the measure of angle ABC is given as follows:

m < ABC + 2 x 34 = 180

m < ABC = 112º.

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The equation that represents the distance traveled by the second car is 60(t + 1.33).

Let t = travel time of the 2nd car when it overtakes the 1st

:

Find the travel time of the 1st car to go 80 mi; time = dist/speed

time = 80%2F60

time = 1.33 hrs for the 1st car to go 80 mi

therefore

(t+1.33) = travel time of the 1st car when it is overtaken

:

When the 2nd overtakes the 1st, they will have traveled the same distance

Write a distance equation, dist = speed * time

:

2nd car dist = 1st car dist

70t = 60(t+1.33)

70t = 60t + 80

70t - 60t = 80

10t = 80

t = 8 hrs travel time of the 2nd car to overtake the 1st

:

;

Confirm this by finding the actual distances, should be equal

70*8 = 560 mi

60*9.33 ~ 560 mi

Hence , the equation that represents the distance traveled by the second car is 60(t + 1.33).

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Answer:

14.1

Step-by-step explanation:

To find the height of the rectangular prism, use the formula for the length of a diagonal of a right rectangular prism.

d=l2+w2+h2−−−−−−−−−−√

Substitute 8 for l, 19 for w, and 25 for d

Then solve for h

25=82+192+h2−−−−√

Simplify.

25=64+361+h2−−−−√

Square both sides.

625=425+h2

Subtract 425 from both sides.

200=h2

Take the positive square root of both sides.

200−−−√=h

Round to the nearest tenth.

14.1≈h

Therefore, the height of the rectangular prism is about 14.1ft

The number of white balls is equally likely to be any number between 1 and n−1.

Let W be the number of white balls in the bin after the nth iteration. W can be any number between 1 and n−1. We can calculate the probability of obtaining a specific number of white balls in the bin by considering the number of possible sequences of choices. There are 2^n possible sequences of choices as each choice is either a white ball or a black ball. The number of sequences in which W white balls are selected is (W choose 1)*(n−W choose 1), which is equal to W*(n−W). Therefore, the probability of W white balls in the bin after the nth iteration is P(W) = (W*(n−W))/(2^n).

Since P(W) is equal for all values of W between 1 and n−1, it follows that the number of white balls is equally likely to be any number between 1 and n−1.

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Answer: 12

Step-by-step explanation:

12/12 is greater than 11/12

12/12>11/12