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2 years ago

-3.1 + s = -19.22 i need serious help with this!!!

Mathematics

1 answer:

olga nikolaevna [1]2 years ago

5 0

Answer:

-16.12

Step-by-step explanation:

Move the -3.1 to the other side so the variable s is isolated. Then on the right side, you will have -19.22 + 3.1. That equals -16.12. That is your answer.

Hope this helped! Please mark me as brainliest!

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3. Find the value of x and y. (80-x) ya (3x +20)° Help meeeee

Mamont248 [21]

Answer:

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Step-by-step explanation:

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2 years ago

This is the last question from my hw

liberstina [14]

Answer:

m = 9, n = 2

Step-by-step explanation:

Find $f^{-1}$ (x) by letting y = f(x) and rearranging making x the subject, that is

y = mx + n ( subtract n from both sides )

y - n = mx ( divide both sides by m )

$\frac{y-n}{m}$ = x

Change y back into terms of x with x = $f^{-1}$ (x) , then

$f^{-1}$ (x) = $\frac{x-n}{m}$

Given $f^{-1}$ (x) = g(x) , then

$\frac{x-n}{m}$ = $\frac{x-2}{9}$

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4 0

3 years ago

What is the solution to the following expression if x=5

jonny [76]

Actually it’s D. or 3

7 0

3 years ago

The length of a rectangle envelope is 2 1/2 times its width. A plastic band surrounds the front and back of the envelope to secu

Andreas93 [3]

Answer:

Length of the envelope = 14

Width of the envelope = 5.6

Step-by-step explanation:

Let the width of the rectangle be x

Then the length of the rectangle will be $2\frac{1}{2} \times x$

Also the length of the plastic band to cover the front and back of the envolpe = $39\frac{3}{8}$

To cover one side th band required is

=> $\frac{39\frac{3}{8}}{2}$

=> $\frac{\frac{315}{8}}{2}$

=> ${\frac{315}{16}$

=>39.4

We know that the perimeter of the rectangle is

=> 2( L + B) = ${\frac{39.4}{2}$

=> 2( $2\frac{1}{2} \times x + x$ ) = 19.7

=> 2( $\frac{7}{2}x) = 19.7$

=> $3.5x = 19.7$

=> $x = \frac{19.7}{3.5}$

=> $x = 5.6$

Now length of the envelope =

=> $2\frac{1}{2} \times x$

=> $2.5 \times 5.6$

=> 14

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2 years ago

Donovan took a math test and got 20 correct questions and 5 incorrect answers. What was the percentage of correct answers?

solong [7]

ANSWER

80%

EXPLANATION

Donovan got 20 questions correct and 5 questions incorrect.

This means that the total number of questions he attempted in the test is the sum of correct and incorrect questions:

Total = 20 + 5

Total = 25

To find the percentage of correct answers, we have to divide the number of correct answers by the total number of questions attempted and multiply by 100 (per cent).

That is:

$\begin{gathered} \frac{20}{25}\cdot\text{ 100 = }\frac{4}{5}\cdot\text{ 100} \\ =\text{ 80\%} \end{gathered}$

That is the percentage of correct answers.

3 0

11 months ago