Hey if you change 5/8 into a decimal you get 0.625. if you multiply 80•0.625 you get 50.
john can clean 6 pools in 10 hours bc i think you just have to multiply 3/5 by 10
2nd and 4th are functions
an x value in a set of functions can only have one y value. however, a y value can have infinite amount of x values
in the 1st and 3rd set, the x value of -2 has 2 y values
Answer:
the answer is b
Step-by-step explanation:
i took the test
The equation of this parabola will have the form f(x) = a(x+5)(x-4), which works out to f(x) = a(x^2 + x - 20). Since the parabola passes thru (3,40),
40 = a(3^2 + 3 - 20), or 40 = a(-8), so a = -5.
Thus, the equation of this parabola is y = -5(x^2 + x - 20).
