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Glencoe Math: Course 3, Volume 2

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Glencoe Math: Course 3, Volume 2 View details

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Exercise 3 Page 504

Solve for the variable by using the Cross Products Property.

14.8

Practice makes perfect

To solve the proportion, we will use the Cross Products Property.

12/z = 30/37

Cross multiply

12(37) = 30z

.LHS /30.=.RHS /30.

12(37)/30 = 30z/30

SplitIntoFactors

Split into factors

6 * 2(37)/6 * 5 = 30z/30

CancelCommonFac

Cancel out common factors

6* 2(37)/6* 5 = 30z/30

Simplify quotient

2(37)/5 = z

Multiply

74/5 = z

Calculate quotient

14.8 = z

Rearrange equation

z = 14.8

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Quick Check p.504