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Over [174]
2 years ago
6

PLEASE HELP I JUST NEED TO KNOW HOW TO DO IT

Mathematics
2 answers:
RoseWind [281]2 years ago
7 0
Your answer should be x=7 and y=7
Brilliant_brown [7]2 years ago
5 0

Answer:

y=7, x=7

Step-by-step explanation:

They both equal y, so you can set the right part of the equations equal to each other

4x-21=2x-7

solve for x

2x-21=-7

2x=14

x=7

knowing x, we can now substitute back into one of the original equations to find y

y=4(7)-21=28-21=7

or

y=2(7)-7=14-7=7

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S the standard deviation of the sample a good estimate of the variation of salaries of tv personalities in​ general?
ziro4ka [17]
The answer is No because the sample is not representative of the whole population. The standard deviation of the sample is not a good estimate of the variation of the salaries of the TV personalities in general because a single sample is not counted as a whole. Standard Deviation is a quantity that is calculated to indicate the extent of deviation of the population or group as a whole. Standard deviation also represented by the symbol σ means sigma in Greek letter or s in Latin letter. It is also the measurement of a set of data values that are used to quantify the amount of variation.
3 0
3 years ago
A truck is carrying a cars weighing an average of 4500 pounds each what is the total weight in tons of cars on the truck
Yuliya22 [10]

Answer:

2.25 tons

Step-by-step explanation:

It is a conversion problem. The connection between ton and pound is in the following order:

1 pound = 0.0005 tons

By multiplying each side by 4500 we can easily find the answer of this problem:

4500 pounds = 2.25 tons

4 0
3 years ago
What is 851.64 in expanded notation?
navik [9.2K]
8 x 100 = 800
5 x 10= 50
1x1=    1
6 x 0.10= 0.6
4 x 0.01 = 0.04
              = 851.64
7 0
3 years ago
This is the choices <br> 88<br> 70<br> 110<br> 120
s344n2d4d5 [400]

Answer:

110

Step-by-step explanation:

Y and X have to equal 180

70+x+180

=110

7 0
3 years ago
Read 2 more answers
The formula for the volume of this rectangular prism is:<br><br> V = 5x3 + 29x2 + 34x – 8
mel-nik [20]

Answer:

-199

Step-by-step explanation:

7 0
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