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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

4. Parallel Lines and Proportional Parts

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Exercise 65 Page 581

Substitute the given value into the equation that describes the relationship.

At least 167

Practice makes perfect

Let's take a look at the equation we wrote in the Example 1. This equation tells us that the amount of money raised r is 0.45 times the number of pom poms sold n. r= 0.45 n We want to determine how many pom poms the booster club must sell to raise $75 for charity. To do so, we should substitute 75 for r into the equation and solve for n.

r=0.45n

r= 75

75=0.45n

\Rearrange<premium partialsolution=1>Eqn

0.45n=75

.LHS /0.45.=.RHS /0.45.

0.45n/0.45=75/0.45

MovePartNumRight

a* b/c=a/c* b

0.45/0.45n=75/0.45

Calculate quotient

n=166.666666...

Round to nearest integer

n≈ 167

The booster club must sell at least 167 pom poms to raise $75.</premium>

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Exercises p.577-581