Arain barrel is full of water and used to water a garden. the rain barrel loses water at the rate of 2.5 gallons of water per minute. after seven minutes, the rain barrel contains 37.5 gallons. how many gallons of water were initially in the rain barrel? show and explain your work.

Step-by-step explanation:

Loss of water per minute = 2.5 gallons

Loss of water for 7 minutes = 2.5 * 7 =  17.5 gallons

Water initially in the gallon = 37.5 + 17.5 = 55 gallons

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2