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alina1380 [7]
2 years ago
9

The difference between 3 times a number and 5 is 7. What is the number?

Mathematics
1 answer:
Vesna [10]2 years ago
8 0

Answer:

4

Step-by-step explanation)

n(3) - 5 = 7

n(3)= 7 + 5

n(3)= 12

n3/3 = 12/3

n =4

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Suppose x has a normal distribution with mean μ = 45 and standard deviation σ = 9. describe the distribution of x values for sam
Fofino [41]
The standard deviation of a particular sample is equal to the standard deviation divided by the square root of the sample size.  That is,\sigma_x=\frac{\sigma}{\sqrt n}
The mean of a particular sample is equal to the mean of the set the sample was taken from.  That is,
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4 0
3 years ago
Please help 12+2x-14x+8=
bulgar [2K]

Answer:

-12x+20

Step-by-step explanation:

12+2x-14x+8

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Reorder: -12x+20

8 0
3 years ago
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lbvjy [14]

Answer:

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Step-by-step explanation:

x^2 - 3x - 28

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5 0
3 years ago
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triangle ABC was rotated 90 degrees clockwise. Then it underwent a dialtion centered at the origin with a scale factor of 4 what
scoray [572]

Answer: The angles of ΔA'B'C are congruent to the corresponding parts of the original triangle.

Step-by-step explanation:

Given : Triangle ABC was rotated 90 degrees clockwise. Then it underwent a dilation centered at the origin with a scale factor of 4.

A rotation is a rigid transformation that creates congruent images but dilation is not a rigid transformation, it creates similar images but not congruent.

Also, the corresponding angles of similar triangles are congruent.

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