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f(x)=-1x^2-8x+33
x coordinate of vertex is -b/2a in the form ax^2+bx+c=y
a=-1
b=-8
-(-8)/2(-1)=8/-2=-4
plug back in to get y value
y=-(-4^2)-8(-4)+33
y=-16+32+33
y=49
y value is 49
By hypothesis, 1 km = 0.62137 mi.
Jamal has to drive 56 kilometers until he arrives at his destination, so he needs to drive 56*0.62137 = 34.7967 mi.
So Jamal have 34.7967 miles left.
Hope this helps! :)
Answer:
Step-by-step explanation:
Take the pre-sale price.
Divide the original price by 100 and multiply it by 30.
Take this new number away from the original one.
The new number is your discounted value.
