Bob purchased a new more efficient European weed whacker that uses gasoline at a rate of 0.75 quarts per hour. Write an equation to represent the relationship between x, the number of hours the weed whacker is used, and y, the number of gallons of gasoline used. (Hint: 4 quarts equals 1 gallon) Round your answer to the thousandths place.

we don't have enough info to solve this

correct answer:

b.(19,-2)

r and t.

both are 64 degrees.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!