Answer:
A
Step-by-step explanation:
Multiply this 15 mph by the conversion factor derived from 1.6 km = 1 mi:
15 mph 1.6 km
------------ * ---------- = 24 km/hr
1 1 mi
The cyclist's speed in km/hr is 24 km/hr.
In 3 hrs the cyclist can cover (24 km/hr)(3 hr) = 72 km.
The correct answers would be the letter C
Let's represent the unknown number with the variable x:
9x - 12
9x is the product of 9 and a number, and it is being subtracted by 12
