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2 years ago

PLEASE HELP URGENT!!!!!!!!!!!!!!!

Mathematics

1 answer:

trasher [3.6K]2 years ago

8 0

Answer:

a.) 26< a 28

b.) 4

Step-by-step explanation:

a.) After looking at the age in years collum you can notice that all of ages have a difference of 2. With this you can infer that the missing number is 28.

b.) To find the mean add up all the numbers in the frequency column.

3+2+7+8+0=20

Divide that by the amount of numbers. There are 5 numbers so 20/5=4.

Hope this helps!

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Step-by-step explanation:

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3 years ago

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3 years ago

Jerry solved the system of equations. x minus 3 y = 1. 7 x + 2 y = 7. As the first step, he decided to solve for y in the second

Reika [66]

Answer:

A. The variable x in the first equation has a coefficient of one so there will be fewer steps to the solution.

Step-by-step explanation:

Given

$Equation\ 1: x - 3y = 1$

$Equation\ 2: 7x + 2y = 7$

Required

Efficient way of solving the equations

The efficient way of solving this problem is by solving for x in the first equation because it has a coefficient of 1;

The evidence is shown as follows;

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Open bracket

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Divide both sides by 23

$\frac{23y}{23} = \frac{0}{23}$

$y = 0$

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Substitute 0 for y in the above expression

$x = 1 + 3(0)$

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Solving for y in the second equation will take more steps

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3 years ago