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ivanzaharov [21]
2 years ago
6

Four times the sum of a number and two is nine less than five times the same number. Find the number

Mathematics
2 answers:
Nuetrik [128]2 years ago
7 0

Answer:

the number= 17

Step-by-step explanation:

4 (x +2) = 5x -9

4x + 8 = 5x - 9

5x - 4x = 8 + 9

x= 17

dybincka [34]2 years ago
5 0

Answer:

17

Step-by-step explanation:

17*5=85

4(17+2)=76

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Simplify <br> -4(11+4n)-3(-2n+9)
nignag [31]

Answer:

-71-10n

Step-by-step explanation:

-4(11+4n)-3(-2n+9)

-44-16n+6n-27

-44-27-10n

-71-10n

4 0
2 years ago
From the set {7, 21, 63}, use substitution to determine which value of x makes the inequality true.
valina [46]

Answer:

63

Step-by-step explanation:

Assume, instead of > there was a =

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4 0
2 years ago
Will give brainliest! Please help
Mashutka [201]

Answer: 1,2,3,4,5

1a,3b,5c,2d

Step-by-step explanation:

7 0
2 years ago
An empty box is shaped like a rectangular prism. the box has a base area of '9/10' square foot and a height of '1/3' foot. How m
maxonik [38]

Answer:3/10

Step-by-step explanation:

9  divided by 3 is 3 so that it

Next to 3/10 the denominator away stays the same,

3 0
2 years ago
An SRS of 450 450 high school seniors gained an average of ¯ x = 20 x¯=20 points in their second attempt at the SAT Mathematics
maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

, where n= sample size.

\sigma = standard deviation.

\overline{x}= sample mean.

z*= Critical value.

Given : n= 450

\overline{x}=20

\sigma=49

Critical value for 95% confidence = z*=1.96     [From z-value table]

Then, the 95% confidence interval will be :-

20\pm (1.96)\dfrac{49}{\sqrt{450}}

\approx 20\pm (1.96)(2.31)

\approx 20\pm 4.53

=(20-4.53,\ 20+4.53)=(15.47,\ 24.53)

Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0
3 years ago
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