Answer is <span>C. 9x-2y=-40
hope that helps
because y = 9/2x +20 then 2y = 9x + 40 so 9x -2y = -40
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To solve this equation , we need to write it in quadratic form

To get the equation in quadratic form we replace x^2 with u

can be written as
, Replace u for x^2
So equation becomes

Now we factor the left hand side
-16 and -1 are the two factors whose product is +16 and sum is -17
(u-16) (u-1) = 0
u -16 = 0 so u=16
u-1 =0 so u=1
WE assume u = x^2, Now we replace u with x^2
Now take square root on both sides , x= +4 and x=-4
Now take square root on both sides , x= +1 and x=-1
So zeros of the function are -4, -1, 1, 4
Answer:120 degrees
Step-by-step explanation:
24 out 72 orders:.
We have total of 360° in a pichart,
So degrees that will be needed to represent 24 out of 72 on pie chart is :
Pizza= (24 / 72 ) * 360°
Pizza=8640 / 72
Pizza= 120°
B 0.05 since the thousandth digit is higher than 5, it needs to be rounded up.