The amount he can spend in December given that he spent $30, $80, $45, and $35, respectively in the other 4 months is; x = $60.
How much can he spend in December given his spending in the last four months?It follows from the task content the intention is to spend a mean of $50 a month towards music.
On this note, it follows that the since the mean is given by the ratio of the sum of all data values and the number of data values, it follows that;
Mean = 50 = (30+80+45+35 + x)/5
where x = spending in December.
multiply both sides by 5;
(30+80+45+35 + x) = 250
x = 250 -30 -80-45-35
x = $60.
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i need an answer!! (marking as brainliest)
Answer: I hope this helps.
Step-by-step explanation:
Find a linear equation whose graph is the straight line with the given properties.
through (1, 4) with slope 6
Answer:
y = 6x - 2
Step-by-step explanation:
We will use the slope-intercept form of a line to help us. We know the slope, we need to determine the y-intercept. To find this, we need an x and y on the line and the slope. Fortunately, they have given us all of the information. An ordered pair is in the form (x,y) So we will use x = 1 and y = 4 from the point they have given us (1,4) They have also given us the slope of 6. We will plug this all into our equation and solve for b the y-intercept.
y = mx + b
4 = 6(1) + b
4 = 6 + b Subtract 6 from both sides of the equation.
-2 = b
Now, write the equation
y = mx + b
y = 6x -2
The population of Nevada was 3.0 million in 2018 and 2.7 million. in 2010. Assuming an exponential model: (a) Write the population of Nevada in the form N = Noat, where N is the population of Nevada in millions, No and a are constants, and t is time in years since 2010. NOTE: Enter the exact answer for No. Enter an exact value for a or round to 4 decimal places. N(t) = = (b) What was the estimated population of Nevada in 2009? NOTE: Round your answer to 3 decimal places. The population in 2009 was approximately million people.
the exponential model is given as N = 2.7 (1.0133)^(t) and the estimated population in 2009 was 2.6646 million.
According to the question, we have the information that:
N = 3 million
No = 2.7 million
a = 8 years
Now, we need to find the exponential model for the given data.
Do putting the values in the equation to get the value of a, we have:
3 = 2.7 (a)^(8)
1.1111 = a^(8)
a = 1.0133
So, the exponential model will be:
N = 2.7 (1.0133)^(t)
Now, the estimated population in 2009 will be:
t = - 1
So, we get that:
N = 2.7 (1.0133)^(-1)
N = 2.7 / 1.0133
N = 2.6646 million
Therefore the exponential model is given as N = 2.7 (1.0133)^(t) and the estimated population in 2009 was 2.6646 million.
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Geometry study guide help? I will give brainliest.
- 8/32 in simplistic form
Anais bought 5/2 yards of ribbon. She had 1 feet 6 inches of ribbon left after trimming some curtains. How many inches of ribbon did Anais use to trim the curtains?
Answer: The number of ribbons used to trim the Curtains are 72 inches.
Step-by-step explanation:
Let us convert all numbers into inches.
Then, 1 yard= 36 inches
Given data, 5/2yards
So, 5/2 yards means.,
5/2= 2.5 yards
We can write: 2.5yards=2.5x36inches
=90inches
We convert feet into inches
1feet=12inches
We consider 1feet=12inches
In this question she had 1feet 6 inches of ribbons left.
Then 1x12=12inches
More 6 inches: 12+6=18inches
Now subtract 18 inches from 90 inches to get the inches used to trim curtains
Then, 90inches-18inches=72 inches
Thus, the number of ribbons used to trim the Curtains are 72 inches.
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Tony buys CDs at a music store. You get 20% off the price of a CD. You still have to add 5% sales tax. But you find the sales tax after the discount. So you save money on taxes, too." How much money does Tony save by getting the discount before adding the sales tax? Explain by using expressions.
Answer:
Lets say a CD costs a 100 dollars (which it obviosly doesn't)
No matter whether we do the discount before or after tax, it'll end up costing 84 dollars to by the CD.
80% of 100 = 80
80 * 1.05 = 84
80% of 105 = 84
The order in which he does the discount and the tax doesn't matter.
Hope this helps.
HELP PLEASE I WILL GIVE BRAINLYEST! ALGEBRA 1 HW
no brainlyest unless questions are fully answered
3y+z=am-4y look for y
The value of y is am-z/7
How to calculate the value of y ?The expression is given as follows
3y +z= am-4y
The first step is to collect the like terms in both sides, this way the numbers that both have y as their coefficient will be on the same side
3y + 4y= am-z
y(3+4)= am -z
7y= am-z
Divide both sides by the coefficient of y which is 7
7y/7= am-z/7
y= am-z/7
Hence the value of y in the expression is am-z/7
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What is 4,788 divided by 54?
Answer:
88.7 rounded and 88.66 not rounded
Why do banks charge a fee when clients transact on their accounts?
Answer:
Banks charge fees to help make a profit.
Step-by-step explanation:
Bank fees allow financial institutions to recoup operating expenses. Banks also make money on loans, via interest and other fees.
Translate this sentence into an equation.
54 is the sum of 12 and Rhonda's height.
Use the variable r to represent Rhonda's height.
Answer:
54=12+r
Step-by-step explanation:
'Sum' means to add.
54 = 12 + rhonda's height
54 = 12 + r
1. Which statement correctly describes the perpendicular bisector construction below?
Answer:
option c is correct....
li has a jar full of marbles. In the jar there are 15bblue marbles, 10 red marbles and 16 purple marbles. a. She selects a marble at random from the jar. She does not replace the marble. She selects a second marble from the jar. What is the probability that both marbles are red? What is the correct interpretation of this question?
The probability that both marbles are red will be 0.055.
What is probability?Its basic premise is that something will almost certainly happen. The percentage of favorable events to the total number of occurrences. The probability is given as,
P = (Favorable event) / (Total event)
A jar full of marbles is kept by Li. There are 16 purple marbles, 10 red marbles, and 15 blue marbles in the jar. A stone is chosen at random by her from the jar. She leaves the marble alone. She takes another stone out of the jar.
The total number of event = 16 + 10 + 15 = 41
Then the probability of both marble should be red will be given as,
P = (10 / 41) x (9 / 40)
P = 0.055
Thus, the probability that both marbles are red will be 0.055.
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HELP ASAP Question 4(Multiple Choice Worth 2 points) (Scientific Notation in the Real World MC) A TV show had 3.6 x 104 viewers in the first week and 4.1 x 104 viewers in the second week. Determine the average number of viewers over the two weeks and write the final answer in scientific notation. 3.85 x 104 7.7 x 104 3.85 x 108 7.7 x 108
The average number of viewers over the two weeks will be 3.85 × 10⁴.
How to calculate the value?It should be noted that based on the information, the TV show had 3.6 x 10⁴ viewers in the first week and 4.1 x 10⁴ viewers in the second week.
Therefore, the average number of viewers over the two weeks will be:
= [(3.6 × 10⁴) + (4.1 × 10⁴)] / 2
= 3.85 × 10⁴
Therefore, the average number of viewers over the two weeks will be 3.85 × 10⁴.
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Please refer to the picture, thank you!!!
An equation that relates T to N can be written as T = 750 + 630N.
What is an equation?An equation can be defined as a mathematical expression which shows that two (2) or more thing are equal.
What is a function?A function can be defined as a mathematical expression which can be used to define and represent the relationship that exist between two or more variables in a population (data set).
How to write an equation relating T to N.Since the total amount saved by using both plans (functions A and B) is represented by T, an equation that relates T to N can be written as follows:
T = A + B
Substituting the given parameters into the formula, we have;
T = (750 + 135N) + 495N
T = 750 + 135N + 495N
T = 750 + 630N.
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Complete Question:
Raina and her husband are each starting a saving plan. Deshaun will initially set aside $750 and then add $135 every month to the savings. The amount A (in dollars) saved this way is given by the function A=750+135N , where N is the number of months he has been saving. Her husband will not set an initial amount aside but will add $495 to the savings every month. The amount B (in dollars) saved using this plan is given by the function B=495N. Let T be total amount (in dollars) saved using both plans combined. Write an equation relating T to N.
Simplify your answer as much as possible.
Solve the following system of equations using either Gaussian elimination or a
matrix. Write your answer as a point and explain how you would check your work:
2x-y + 4z = 33
x + 2y-3z = -26
-5x - 3y + 5z = 23
Using Gaussian elimination, the solution to the given system of equations is given as follows:
x = 5, y = -11, z = 3.
What is a system of equations?A system of equations is when multiple variables are related, and equations are built to find the values of each variable, according to the relations given in the problem.
For this problem, the variables are x, y and z, and the system is given as follows:
2x - y + 4z = 33.x + 2y - 3z = -26.-5x - 3y + 5z = 23.There are multiple ways in which a system can be solved, and for this one, Gaussian elimination will be used.
The first step is writing the augmented matrix of the system, as follows:
[tex]\left[\begin{array}{cccc}2&-1&4&33\\1&2&-3&-26\\-5&-3&5&23\end{array}\right][/tex]
Then, the first column, which is equivalent to be coefficient of y, has to be of zero on the second and on the third row, hence:
R2 -> 2R2 - R1.R3 -> 5R1 + 2R3.The updated matrix will be given by:
[tex]\left[\begin{array}{cccc}2&-1&4&33\\0&5&-10&-85\\0&-11&30&211\end{array}\right][/tex]
Then, the second column, equivalent to the coefficient of y, on the third row has to be zero, hence:
R3 -> 11R2 + 5R3.
Then the matrix is:
[tex]\left[\begin{array}{cccc}2&-1&4&33\\0&5&-10&-85\\0&0&40&120\end{array}\right][/tex]
From each row of the system, from bottom up, we find the variables, as follows:
40z = 120
z = 120/40
z = 3.
5y - 10z = -85
5y - 30 = -85
5y = -55
y = -11.
2x - y + 4z = 33
2x + 11 + 12 = 33
2x = 10
x = 5.
Hence the solution for the system is:
x = 5, y = -11, z = 3.
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Is (0, 3) a solution to the equation y=x+3? (1 point)
O yes
Ono
Answer: Yes, it is.
Step-by-step explanation:
given: x is 0 and y is 3. Plug in the equation and solve
y=x+3
3=0+3
3=3
Yes, it is a solution
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have a mean weight of 3000 grams and a standard deviation of 430 grams. If a 32-week gestation period baby weighs 2900 grams and a 41-week gestation period baby weighs 3200 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period?
Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice.
(Round to two decimal places as needed.)
A. The baby born in week 41 weighs relatively more since its z-score, enter your response here, is larger than the z-score of enter your response here for the baby born in week 32.
B. The baby born in week 41 weighs relatively more since its z-score, enter your response here, is smaller than the z-score of enter your response here for the baby born in week 32.
C. The baby born in week 32 weighs relatively more since its z-score, enter your response here, is larger than the z-score of enter your response here for the baby born in week 41.
D. The baby born in week 32 weighs relatively more since its z-score, enter your response here, is smaller than the z-score of enter your response here for the baby born in week 41.
Answer:
The 32 week gestation's period baby weighs 0.31 standard deviations below the mean.
The 41 week gestation's period baby weighs 0.65 standard deviations below the mean.
The 41 week gestation's period baby weighs relatively less.
Step-by-step explanation:
Normal model problems can be solved by the zscore formula.
On a normaly distributed set with mean and standard deviation , the z-score of a value X is given by:
The zscore represents how many standard deviations the value of X is above or below the mean .
Find the corresponding z-scores.
Babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 800 grams. A 32-week gestation period baby weighs 2450.
Here, we have .
So
A negative z-score indicates that the value is below the mean.
So, the 32 week gestation's period baby weighs 0.31 standard deviations below the mean.
Babies born after a gestations period of 40 weeks have a mean weight of 2900 grams and a standard deviation of 385 grams. A 41 week gestation period baby weights 2650 grams.
Here, we have
So, the 41 week gestation's period baby weighs 0.65 standard deviations below the mean.
Which baby weighs relatively less?
The 41 week gestation's period baby has a lesser z-score, so this means that he weighs relatively less.
What is the slope of the line represented by the equation y = -x +?
0-1/2
HELP
in the equation y= -x-1/2
the slope is -1/1 which can also be shown as -1.
the question is on the screenshot
Answer:
I believe it's option 3, because you multiply 3 by 4, and get 12
Step-by-step explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
......................................
PLEASE ANSWERING THIS QUESTION!!!
Solve the quadratic equation by completing the square: [tex]\sf{z^2+8z-44=20}[/tex]
Give the equation after completing the square, but before taking the square root. Your answer should look like: [tex]\sf{(z-a)^2=b}[/tex]
The equation is: (blank)
List all solutions to the equation in simplest radical form, separated by commas. The solutions are:
z= (blank)
Rules answering these questions:
Explain your answer!
Do not spam answers!
Show your work!
Nonsense answers will be reported and delete your answers.
Thanks!
The equation after completing the square is (z + 4)² = 80
The solutions to the given equation in the simplest radical form are z = -4 + 4√5 and z = -4 - 4√5
Completing the squareFrom the question, we are to solve the given quadratic equation by completing the square
The given equation is
z² +8z - 44 =20
First, add 44 to both sides of the equation
z² +8z - 44 + 44 = 20 + 44
z² +8z = 64
Now, divide the coefficient of z by 2, square the value and add to both sides
The coefficient of z is 8
Dividing
8/2 = 4
Squaring
4²
Now, add this to both sides
That is,
z² +8z +4² = 64 + 4²
(z + 4)² = 64 + 16
(z + 4)² = 80
The equation after completing the square is
(z + 4)² = 80
Continuation
(z + 4)² = 80
Take the square root of both sides
√(z + 4)² = ±√80
z + 4 = ±√80
z = -4 ± √80
z = -4 ± 4√5
z = -4 + 4√5 and z = -4 - 4√5
Hence,
The equation after completing the square is (z + 4)² = 80
The solutions to the given equation in the simplest radical form are z = -4 + 4√5 and z = -4 - 4√5
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2. Josh went shopping for records and tapes on Monday and Tuesday.
He paid $95 for 4 records and 3 tapes on Monday and paid $70 for 2
records and 2 tapes on Tuesday. Write a system of equations that
could be used to determine the amount of each item and solve.
Answer:
it is very tough questions
What is the volume of a right rectangular prism that is packed with 300 1/5-foot cubes?
The volume of the right rectangular prism = 2.4 ft³
How to Find the Volume of a Cube?A cube is a three dimensional shape that has equal edges and sides. The volume of a cube is calculated as:
Volume = a³, where a is the side length of the cube.
Given:
Side length of one cube (a) = 1/5 ft
Volume of one cube = (1/5)³ = 1/125 ft³
The right rectangular prism has 300 of these cube. Therefore:
Volume of the right rectangular prism = 300 × 1/125
Volume of the right rectangular prism = 300/125
Volume of the right rectangular prism = 2.4 ft³
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How do I find the area of a rectangle with three different side lengths.
Answer:
See explanation
Step-by-step explanation:
If two of the side lengths are equal, use only one of those two equal side lengths. Then, using that one side length, multiply that side length with the third side length to get the area.
side length a, b, and c.
a=b.
A=area.
A=b*c ==> Area of rectangle
Have this done correctly for brainliest!
Answer:
expression
Step-by-step explanation:
It's an expression. The expression happens to be a quadratic polynomial.
An equation must have an equal sign.
An equation is a statement that a number or expression equals a number or expression.
Here, there is no equal sign. There is only an expression.
Answer:
This is an expression
8x2+7x-15
Alan found 444 marbles to add to the 555 marbles in his collection. Then, he went to the store and tripled the number of marbles he had.
Which numerical expression shows the amount of marbles Alan has now?
Choose 1 answer:
Choose 1 answer:
The numerical expression that shows the amount of marbles that Alan has now is; 3(5 + 4)
How to solve algebra word problems?
We are told that he found 4 marbles to add to the 5 marbles in his collection.
Thus, after addition, total number of marbles is;
5 + 4 = 9 marbles
Now, we are told that he tripled this sum of marbles he had. Thus;
Tripling of marbles = 9 * 3
Thus, the numerical expression that shows the amount of marbles that Alan has now is;
3(5 + 4)
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Correct question is;
Alan found 4 marbles to add to the 5 marbles in his collection. Then, he went to the store and tripled the number of marbles he had.
Which numerical expression shows the amount of marbles Alan has now?
Sam's parents gave him a map to reach his house. He is 1.5cm from his home. If each 3 cm on scale drawing equals 5 km, how far is he from the house?
Answer: Sam was 2.5 Km far from his house
Step-by-step explanation:
Sam's parents gave him a map to reach his house.
As per Map Sam was =1.5cm from his home.
To find actual distance from house
If we consider actual distance of sam house =X
We have,
If each 3 cm on scale drawing equals 5 km
We know on map 3cm = 5Km
If 1.5 cm = X Km
We need to cross multiple
3X =1.5 × 5
3X = 7.5
X= 7.5÷3
X= 2.5 Km
Sam was 2.5 Km far from his house.
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A phone company has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 410410 minutes, the monthly cost will be \$71.50$71.50. If the customer uses 720720 minutes, the monthly cost will be \$118.00$118.00. Use your equation to find the total monthly cost if 687687 minutes are used.
The required cost is $ 101.22.
This problem can be solved by unitary method.
Given that monthly cost of customer if he uses 410 minutes is $71.
So, cost per minute = [tex]\frac{71}{410}[/tex]
=$ 0.17
And if the customer uses 720 minutes then the cost is $118.
So, cost per minute is = [tex]\frac{118}{720}[/tex]
=0.16
Now if he uses 687 minutes then for 410 minutes cost incurred will be
= 410 × 0.17
= $ 69.7
And for next 197 minutes cost incurred will be = 197 × 0.16
= $ 31.52
Total cost for 687 minutes = $(69.7 + 31.52)
= $ 101.22
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