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Glencoe Math: Course 3, Volume 2

GM

Glencoe Math: Course 3, Volume 2 View details

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Exercise 4 Page 504

Solve for the variable by using the Cross Products Property.

11.2

Practice makes perfect

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

8/15 = m/21

Cross multiply

21(8) = 15m

.LHS /15.=.RHS /15.

21(8)/15 = 15m/15

SplitIntoFactors

Split into factors

3 * 7(8)/3 * 5 = 15m/15

CancelCommonFac

Cancel out common factors

3* 7(8)/3* 5 = 15m/15

Simplify quotient

7(8)/5 = m

Multiply

56/5 = m

Calculate quotient

11.2 = m

Rearrange equation

m = 11.2

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Quick Check p.504