Complete the equivalent
ratios:
12: = 3: 5

20

Step-by-step explanation:

let the unknown number be x

first you turn the ratio into fraction

3/5=12/x

clear the fraction

12×5=3×x

3x=60

x=20

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

∈3,600

step-by-step explanation: