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2 years ago

PLEASE ANSWER QUICKLY! Simplify –7(x + 10) + 9(x – 4)

Mathematics

2 answers:

sashaice [31]2 years ago

8 0

Answer:

2x - 106 (or x - 53) i hope this helps! :)

Step-by-step explanation:

-7(x + 10) + 9(x - 4)

you need to distribute the -7 with the x and the 10

-7x - 70 + 9(x - 4)

distribute the 9 with the x and -4

-7x - 70 + 9x - 36

combine like terms first the x values

2x - 70 - 36

combine like terms

2x - 106

i dont remember if you divide both by two or not

x - 53 if so x - 53 is the answer

mr_godi [17]2 years ago

3 0

Answer:

2x-106

Step-by-step explanation:

-7(x+10)+9(x-4)

Expand parentheses:

-7x-70+9x-36

Combine like terms:

2x-106

Hope this helps!

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A changes saved<br> Set up a proportion and use it to solve for x.<br> 2<br> 10<br> х<br> 3

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Answer:

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Step-by-step explanation:

The following proportional can be set-up for the figure given:

$\frac{x + 3}{x} = \frac{10 + 2}{10}$

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Answer:

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Step-by-step explanation:

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How many ml of 20 percent acid should be added to pure acid to make 70 ml of 30 percent acid?

Novay_Z [31]

Answer:

61.25%

Step-by-step explanation:

How many ml of 20 percent acid should be added to pure acid

to make 70 ml of 30 percent acid?

let x = amt of 20% mixture

then

(70-x) = amt of pure acid

0.20x + (70-x) =0 .30(70)

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2 years ago

Which of the following is equivalent to <br><br> 3x−4y=18?

sammy [17]

The equation which is equivalent to the equation as given in the task content is; 6x -8y = 36.

<h3>Which equation is equivalent to the equation as given in the task content?</h3>

According to the task content, it follows that the equation which is given in the task content is;

3x -4y = 18.

Hence, upon multiplication of the whole equation by 2; the resulting equation from the multiplication is;

6x -8y = 36

Ultimately, the equivalent equation is; 6x -8y = 36.