Answer:
30.mph
Step-by-step explanation:
20/20=1 40/20=2. 2 minutes for every mile 2 X 30=60 (60 minutes) 1 X 30=30 (30 miles)
y = -4x^2 + 4x + 6
Factor out the leading coefficient:
y = -4(x^2 - x) + 6
Complete the square:
y = -4(x^2 - x + (½)^2) + 4(½)^2 + 6
= -4(x-½)^2 + 7
f(5)= 78.5. I hope this helps!!