HW 7.1 (Ratios, Proportions and Geometric Mean)

Simplify the Ratio.

81 cm to 3 cm

• 27 cm to 1 cm

• 25 cm to 3 cm

• 20 cm to 2 cm

• 81 cm to 3 cm

Simplify the Ratio

72 ft to 9 ft

• 9 : 72

• 8 : 1

• 36 : 2

• 9 : 1

Simplify the Ratio.

4 ft to 24 in

Hint: units of measure must match

• $\frac{5}{2}$

• $\frac{2}{1}$

• $\frac{1}{6}$

• $\frac{1}{4}$

Solve for y.

 $\frac{y}{20}=\frac{3}{10}$  

• 3

• 5

• 8

• 6

 $\frac{x+1}{5}=\frac{4}{10}$  

• 1

• 4

• 13

• 7

 $\frac{4}{x-3}=\frac{2}{5}$  

• 10

• 7

• 19

• 13

 $\frac{3}{2x+5}=\frac{1}{9x}$  

•  $\frac{1}{5}$  

•  $\frac{3}{7}$  

•  $\frac{2}{5}$  

•  $\frac{9}{4}$  

Find the geometric mean between the two numbers.

2 and 18

• 3

• 8

• 6

• 5

Find the geometric mean between the two numbers.

4 and 25

• 23

• 15

• 10

• 1

Find the geometric mean between the two numbers.

6 and 20

• $\sqrt{120}$

• $4\sqrt{10}$

• $2\sqrt{30}$

• $5\sqrt{3}$