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2 years ago

Solve 3x + 7 = 22 for x

Mathematics

2 answers:

MArishka [77]2 years ago

8 0

Answer:

x = 5

Step-by-step explanation:

3x + 7 = 22

Subtract 7 from both sides.

3x + 7 - 7 = 22 - 7

3x = 15

Divide both sides by 3.

x = 5

olasank [31]2 years ago

8 0

X=5 because 22-7 is 15 then divide ot by 3 because you need x by its self then you get x=5
hope this helps and dont forget to hit that heart :)

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A 90% confidence interval is (35 45). What is the margin of error?

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Answer:

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2 years ago

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2 years ago

Please help meeee I don't know this

Vanyuwa [196]

Answer:

$\boxed {m = -\frac{5}{7}}$

Step-by-step explanation:

Use the <u>Slope Formula</u> to determine the slope of two given points:

$m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$

First Point: $(x_{1} , y_{1})$

Second Point: $(x_{2}, y_{2})$

-Substitute both points:

First Point: $(5, 11)$

Second Point: $(19, -1)$

$m = \frac{-1 - 11}{19 - 5}$

-Solve for the slope:

$m = \frac{-1 - 11}{19 - 5}$

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Therefore, the slope is $-\frac{5}{7}$

4 0

3 years ago

use the substitution method to solve the system of equations choose the correct order pair. 3x+y=10 y=x-2

shutvik [7]

3x+(x-2)=10
4x=12
x=12/4=3

y=x-2=3-2=1

so, x=3 and y=1

Answer: (3;1)

3 0

2 years ago

Read 2 more answers

$4 is what percent of $50 ?

dmitriy555 [2]

Answer

Find out the $4 is what percent of $50 .

To prove

By using the percentage formula

$Percentage = \frac{Part\ value\times100}{Total\ value}$

As given in the question

Part value = $4

Total value = $50

Put all the values in the percentage formula as mentioned above.

$Percentage = \frac{4\times100}{50}$

solving the above

$Percentage = \frac{400}{50}$

Percentage = 8%

Therefore $4 is 8% of $50 .

7 0

3 years ago

Read 2 more answers