Answer:
x=-3
Step-by-step explanation:
7x=-13-8
7x=--21
x=-21/7
x=-3
points or brainleist please
Answer:
the answer is 749.71 i think. Have a good day good luck.
Step-by-step explanation:
For this case we have the following expression:
Factoring the expression we have:
We now cancel similar terms:
Finally, simplifying the expression we have:
Answer:
Answer:
a) h = 123/x^2
b) S = x^2 +492/x
c) x ≈ 6.27
d) S'' = 6; area is a minimum (Y)
e) Amin ≈ 117.78 m²
Step-by-step explanation:
a) The volume is given by ...
V = Bh
where B is the area of the base, x^2, and h is the height. Filling in the given volume, and solving for the height, we get:
123 = x^2·h
h = 123/x^2
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b) The surface area is the sum of the area of the base (x^2) and the lateral area, which is the product of the height and the perimeter of the base.
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c) The derivative of the area with respect to x is ...
When this is zero, area is at an extreme.
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d) The second derivative is ...
This is positive, so the value of x found represents a minimum of the area function.
__
e) The minimum area is ...
The minimum area of metal used is about 117.78 m².
Answer:
x=72.5
Step-by-step explanation:
2x-35-15=95 (common factors go together)
2x-50=95 (add 50 to both sides)
2x=145 (divide both sides by 2)
x = 72.5