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3 years ago

Please help ♥ 10 points and brainliest to first and best answer ;)

Mathematics

2 answers:

hram777 [196]3 years ago

7 0

Answer:

the answer is i think is 60.7

Andreyy893 years ago

3 0

Answer:

X = 8

Step-by-step explanation:

Find he scale factor - in this case it's 9/72+9 = 1/9

Then apply that to the other side - 56*1/9=4

This means 3x-20=4

3x=24

x is 8

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What is the number writren in standard form six million, seven hundred ,twenty

enot [183]

6,720,000. I hope that helps!

4 0

3 years ago

Read 2 more answers

(3x+9)^5=32x^5 help solve for x

makvit [3.9K]

Answer:
x = -9

Explanation:

(3x + 9)^5 = 32x^5

(3 (x + 3))^5 = 32x^5

3^5 (x + 3)^5 = 32x^5

243(x + 3)^5 = 32x^5

243(x + 3)^5 - 32x^5 = 0

x = -9

5 0

3 years ago

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Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

Brand A Brand B

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

3 0

3 years ago

HELP PLEASE!!!!

Stels [109]

-9 is the answer

your welcome

5 0

3 years ago

Please answer this correctly

kap26 [50]

Answer:

There is only one number from 21-25

5 0

3 years ago