The Baldwin family walked 4/5 of a mile in 4/9 of an hour. What is their unit rate in miles per hour? (5 points)

A. 4/9 over 4/5 = 4/9 miles per hour
B. 4/5 over 4/9= 1 4/5 miles per hour
C. 4/9 over 4/5= 1 4/5 miles per hour
D. 4/5 over 4/9= 4/9 miles per hour

Unit rate = Distance / time

Unit rate = 4/5 over 4/9

When dividing two fractions flip the second one over and multiply:

4/5 x 9/4 = 36/20 = 1 16/20 = 1 4/5 miles per hour

The answer is: B. 4/5 over 4/9= 1 4/5 miles per hour

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.