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3 years ago

13 is what percent of 16 would you do 100x13 and divide that by 16?? #help

Mathematics

2 answers:

Masteriza [31]3 years ago

8 0

yah when finding percent you dived the top number by the bottom number then multiply by 100. 13/16=.8125

.8125x100=81.25%

lord [1]3 years ago

7 0

13 divided by 16 is 0.8125, so 13 is 81.25% of 16

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2 years ago

Which logarithmic equation is equivalent to 2^5=32

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Read 2 more answers

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;

Make x the subject of formula in equation 1

$x = 1 + 3y$

Substitute 1 + 3y for x in equation 2

$7x + 2y = 7$

$7(1 + 3y) + 2y = 7$

Open bracket

$7 + 21y + 2y = 7$

$7 + 23y =7$

Make y the subject of formula

$23y = 7 - 7$

$23y = 0$

Divide both sides by 23

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

$y = 0$

Recall that x = 1 + 3y

Substitute 0 for y in the above expression

$x = 1 + 3(0)$

$x = 1 + 0$

$x = 1$

Solving for y in the second equation will take more steps

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3 years ago