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Pani-rosa [81]
3 years ago
5

PUZZLED HELP! If I solve an equation, get the answer, but when I do a" check step", does it mean that I have to solve the equati

on again? Example: 3(x – 1) + 2x = 6x is equaled to -3, but when I checked it the answer was false...-16=-18 (false)
Mathematics
2 answers:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

If it's wrong then yes you should try to solve the equation again if not then you should be fine to just move on

Zolol [24]3 years ago
6 0
When you check it, you are solving but with a different strategy
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  • Answer:

2.5875

Step-by-step explanation:

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3 years ago
A lumber company is making boards that are 2920.0 millimeters tall. If the boards are too long they must be trimmed, and if the
Effectus [21]

Answer:

The value of the test statistic is of 0.22.

Step-by-step explanation:

Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the expected mean, \sigma is the standard deviation(square root of the variance) and n is the size of the sample.

A lumber company is making boards that are 2920.0 millimeters tall.

This means that \mu = 2920.

A sample of 12 is made, and it is found that they have a mean of 2922.7 millimeters with a variance of 121.00.

This means that X = 2922.7, n = 12, \sigma = \sqrt{121} = 11. So

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

t = \frac{2922.7 - 2922}{\frac{11}{\sqrt{12}}}

t = 0.22

The value of the test statistic is of 0.22.

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Step-by-step explanation:

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Anni [7]
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B) Correct , Aisha is not 43 and less she is less than that.

C) no, she may just need to grow 1 or 2 inches who knows.

D) nope, Aisha is at most 43 ( at least = 43 or taller)

at most 43 or less
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3 years ago
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