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Dima020 [189]
3 years ago
8

I need help on this question ​

Mathematics
1 answer:
nadezda [96]3 years ago
4 0

Answer:

(12.2,-6.4)

Step-by-step explanation:

The results from Desmos are as shown.

The displayed values are (12.294, -6.353)

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A researcher determines that students are active about 60 + 12 (M + SD) minutes per day. Assuming these data are normally distri
rjkz [21]

Answer:

The correct option is (b).

Step-by-step explanation:

If X \sim N (µ, σ²), then Z=\frac{X-\mu}{\sigma}, is a standard normal variate with mean, E (Z) = 0 and Var (Z) = 1. That is, Z \sim N (0, 1).

The distribution of these z-variate is known as the standard normal distribution.

The mean and standard deviation of the active minutes of students is:

<em>μ</em> = 60 minutes

<em>σ </em> = 12 minutes

Compute the <em>z</em>-score for the student being active 48 minutes as follows:

Z=\frac{X-\mu}{\sigma}=\frac{48-60}{12}=\frac{-12}{12}=-1.0

Thus, the <em>z</em>-score for the student being active 48 minutes is -1.0.

The correct option is (b).

4 0
3 years ago
(5x-3)^2 -60x=(5x-3)^2
V125BC [204]

Answer:

x = 0

Step-by-step explanation:

3 0
3 years ago
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Delbert Rowell drove his tractor rig 58,125 miles in 6 months. Estimate how many miles he drove in each month
zzz [600]

Answer:

just do 58,125 divided by 6

Step-by-step explanation:

6 0
3 years ago
Samuel and Zander together have $392. Samuel has six times as much money as Zander. How much does each have? Please help! Quick
Shalnov [3]

Answer:

Samuel has $336 and Zander has $56

Step-by-step explanation:

Samuel = 6x because he has 6 times Zander

Zander = x

Together they have 392

6x + x = 392

7x = 392

Divide both sides by 7

x = 56

Samuel = 6 x 56 = 336

Zander = 56

336 + 56 = 392

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3 years ago
Help plsssssssssssssss​
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Answer:

75

Step-by-step explanation:

3 0
3 years ago
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