9514 1404 393
Answer:
80
Step-by-step explanation:
ab is the product of 'a' and 'b'. For the given values, that is the product ...
ab = (-16)(-5) = 80
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When the number of minus signs is even, the resulting product is positive.
Let x be the length and y be the width2x + 2y = 40x + y = 20change that into y = mx + b formy= 20 – x
Area =xy = x (20-x) = 20x - x^2Area=-x^2+20xcomplete the square:Area=-(x^2 – 20x + 100) +100=-(x - 10)^2 + 100This is an calculation of a parabola that opens downward with vertex at (10,100), which means maximum area of 100 happens when x, the length=10)Dimensions of the rectangle with maximum area? 10 yds. by 10 yds., a square.
I’m pretty sure it is C but I’m not sure if I’m right or not
Step-by-step explanation:
The given function is :
(a) To find f(9), put x = 9 in the above expression.
(b) To find f(x+7), put x = x+7 in the above expression.
(c) To find f(-x), put x = -x in the above expression.
Hence, this is the required solution.
The correct answer would be C) 3%