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SIZIF [17.4K]
3 years ago
7

The table shows jills math quiz scores. what is the minimum score she needs on her next quiz to have a mean of at least 92

Mathematics
1 answer:
Feliz [49]3 years ago
3 0

Answer:

90

Step-by-step explanation:

The mean is the average:

(92 + 96 + 94 + 88 + x) / 5 ≥ 92

370 + x ≥ 460

x ≥ 90

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If the mean of 5 positive integers is 15, what is the maximum possible difference between the largest and the smallest of these
Vikki [24]

Answer:

if the 5 numbers are different, the maximum difference is 64

Step-by-step explanation:

We have 5 positive (different) integers, a, b, c, d and e (suppose that are ordered from least to largest, so a is the smallest and b is the largest.

The mean will be:

M = (a + b + c + d + e)/5 = 15.

Now, if we want to find the largest difference between a and e, then we must first select the first 4 numbers as the smallest numbers possible, this is:

a = 1, b = 2, c = 3 and d = 4

M = (1 + 2 + 3 + 4 + d)/5 = 15

M = (10 + d)/5 = 15

10 + d = 15*5 = 75

d = 75 - 10 = 65

then the difference between a and d is = 65 - 1 = 64.

Now, if we take any of the first 4 numbers a little bit bigger, then we will see that the value of d must be smaller, and the difference between d and a will be smaller.

5 0
3 years ago
Systems of Equations Word Problem:
Semmy [17]
X= fancy, y= plain
x+y= 7
28x+ 15y=131
solve by substitution
4 0
3 years ago
7/4x^2 -2 = - 0.05x + 4
nata0808 [166]

Answer:

x1=\frac{-2-2\sqrt{29401} }{245}  x2=\frac{-2+2\sqrt{29401} }{245}

Step-by-step explanation:

Step One: Convert

49/16x^2-2=-0.05x+4

Step Two: Multiply Both Sides by 80

245x^2-160=-4x+320

Step Three: Move everything to the left

245x^2+4x-480=0

Final Step: Quadratic Formula

x1=\frac{-2-2\sqrt{29401} }{245}  x2=\frac{-2+2\sqrt{29401} }{245}

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3 years ago
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Answer:

A

Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

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