Y=7-4x-4x²
find maximum

the answer is (1/2,8)

rewrite y=7-4x-4x^2 as y=-4x^2-4x+7

a=-4, b=-4, c=7

x=-(-4)/2(-4)  

x= -1/2

plug -1/2 in for x    

-4( -1/2)^2-4( -1/2)+7

y=8

Step-by-step explanation:

Hope this helped

answer: 20

step-by-step explanation: subtract the minimum date value from the maximum data value to find the date range. in this casem the date range is 42 - 22 = 20

hope this ! : ) ~zane