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Pearson Algebra 1 Common Core, 2011

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Pearson Algebra 1 Common Core, 2011 View details

Cumulative Standards Review

Exercise 8 Page 229

You can solve for the variable by using cross products.

H

Practice makes perfect

To solve the proportion, we will start by using cross products.

18/x=5/7

Cross multiply

18(7)=x(5)

Multiply

126=5x

.LHS /5.=.RHS /5.

126/5=5x/5

Calculate quotient

25.2=x

Rearrange equation

x=25.2

The solution corresponds to the option H.