CPM Homework Help : CC2MN Problem 8-100

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8-100.

Find the missing value in each of the pairs of equivalent ratios below.

$\frac{x}{10}=\frac{6}{15}$
Hint (a):
Think about what values would go in a Giant One to turn tenths into fifteenths.
Step 1 (a):
$\left(\frac{x}{10}\right)\left(\frac{1.5}{1.5}\right)=\frac{6}{15}$
Step 2 (a):
$x(1.5)=6$
What number multiplied by $1.5$ gives $6$ ?
Answer (a):
$x=4$

$\frac{12}{9}=\frac{8}{x}$
Hint (b):
This problem is very similar to part (a).
Answer (b):
$x=6$

$\frac{16}{38}=\frac{200}{m}$
Hint (c):
How could you use a Giant One to find the value of $m$ ?

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