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omeli [17]
3 years ago
13

The function f(x) = -5x2 + 3 is

Mathematics
1 answer:
asambeis [7]3 years ago
5 0

Answer:

A. -77 < f(x) < -2

Step-by-step explanation:

- 4 < x < -1 so : (-1)² < x² < (-4)² because  f is decrasing if - 4 < x < -1

1< x² < 16.....now multiply by : -5

-80 < - 5x² < -5   add 3  you have : -77< - 5x²+3 < -2

-77 < f(x) < -2

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Answer:

To reduce the weight by 10 lbs you need to remove two reams of paper, leaving you with 10 reams. The only way to fit these into a cuboid would be 5 stacks of 2,  2 stacks of 5, 1 stack of 10 or 10 stacks of 1. You need to figure out the dimensions of paper arranged like that then work out the surface area. Obviously 1 x 10 or 10 x 1 will be stupid because the box would be awkward to carry, so the correct answer will be whichever of the other two gives you the least surface area (and therefore requires the least packaging). I guess you also need to consider the relative orientations of the stacks - long end to long end or short end to short end. When filled, what is the weight of the paper in the current-sized box?_____pounds <em>10*5=50 lb </em>

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4 years ago
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3 years ago
What is the probability that a random sample of 17 pregnancies has a mean gestation period within 9 days of the mean?( length of
ozzi

Answer:

0.9864

Step-by-step explanation:

The average sample mean is 295, and the standard deviation is:

σ = 15 / √17

σ = 3.64

The z-scores are:

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z₁ = (-9) / 3.64

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z₂ = 2.47

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P(-2.47 < Z < 2.47) = 0.9864

6 0
3 years ago
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Step-by-step explanation:

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Answer:

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given

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5x - y = 9 ← in standard form

6 0
2 years ago
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