115 students choose to attend one of three after school activities: football, tennis or running. There are 51 boys.
32 students choose football, of which 25 are girls.
47 students choose tennis.
12 girls choose running.
A student is selected at random.
What is the probability this student chose running?
Give your answer in its simplest form.

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.

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s

answer:

c) the x-coordinate of the center of the circle increases by 3

step-by-step explanation:

a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 2 times the age of the child?

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this needs to be the answer format, or else your answer is incomplete.

if the number of years is x, then the equation is

in __ years