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McGraw Hill Integrated II, 2012

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McGraw Hill Integrated II, 2012 View details

5. Angles of Elevation and Depression

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Exercise 48 Page 669

Solve for the variable by using the Cross Products Property.

63/8=7.875

Practice makes perfect

To solve the proportion, we will start by using the Cross Products Property.

12/21=45/10x

Cross multiply

12 * 10x=21*45

Multiply

120x=945

From here, we will continue solving for x by using the Properties of Equality.

120x=945

.LHS /120.=.RHS /120.

x=945/120

a/b=.a /15./.b /15.

x=63/8

Use a calculator

x=7.875

Subchapter links

Exercises p.665-669