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Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
Chapter Review
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Exercise 45 Page 155

You can solve for the variable by using cross products.

- 4

Practice makes perfect

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

- 8/10=y/5
CrossMult

Cross multiply

- 8* 5=10* y
Multiply

Multiply

- 40=10y
DivEqn

.LHS /10.=.RHS /10.

- 40/10=10y/10
CalcQuot

Calculate quotient

- 4=y
RearrangeEqn

Rearrange equation

y=- 4

When y=- 4, the ratios are proportional.

Subchapter links expand_more
arrow_right Exercises p.152-156
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Exercises 7 (Page 153)
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