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McGraw Hill Glencoe Algebra 1, 2012

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McGraw Hill Glencoe Algebra 1, 2012 View details

8. Literal Equations and Dimensional Analysis

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Exercise 51 Page 131

You can solve for the variable by using the Cross Products Property.

1.67

Practice makes perfect

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

3/4.5=x/2.5

Cross multiply

3(2.5) = 4.5x

Multiply

7.5=4.5x

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

7.5=4.5x

.LHS /4.5.=.RHS /4.5.

7.5/4.5=x

a/b=.a /1.5./.b /1.5.

5/3=x

Rearrange equation

x=5/3

Calculate quotient

x=1.6666...

Round to 2 decimal place(s)

x ≈ 1.67

Subchapter links

Check Your Understanding p.128

Practice and Problem Solving p.129-130

H.O.T. Problems p.130

Standardized Test Practice p.131

Spiral Review p.131

Skills Review p.131