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3 years ago

Which expression is equivalent to the given expression? -2x +8x -9 +4x +7x2 +2 A. B. C. D.

Mathematics

1 answer:

Crazy boy [7]3 years ago

6 0

Answer:

The answer is " $7x^2 +10x -7$ "

Step-by-step explanation:

Let the given value is:

$\to \bold{-2x +8x -9 +4x +7x^2 +2}\\\\$

Solving the given value:

$\to7x^2 -2x +8x +4x-9 +2\\\\\to7x^2 +10x -7\\\\\to7x^2 +10x -7\\\\$

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butalik [34]

Answer:

Step-by-step explanation:

Set equation equal to 0

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2 years ago

Identify a number that results in a 4-digit-number when 156,350 is subtracted from it

jekas [21]

160,000 - 156,350 =3,650

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3 years ago

( 1/4) ꓥ -3 = A= -64 B= -1/64 C= 1/64 D= 64

Anna11 [10]

Answer:

C-1/64

Step-by-step explanation:

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Mark the brainliest

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3 years ago

A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 70% pure anti

andre [41]

Answer:

First brand of antifreeze: 21 gallons

Second brand of antifreeze: 9 gallons

Step-by-step explanation:

Let's call A the amount of first brand of antifreeze. 20% pure antifreeze

Let's call B the amount of second brand of antifreeze. 70% pure antifreeze

The resulting mixture should have 35% pure antifreeze, and 30 gallons.

Then we know that the total amount of mixture will be:

$A + B = 30$

Then the total amount of pure antifreeze in the mixture will be:

$0.2A + 0.7B = 0.35 * 30$

$0.2A + 0.7B = 10.5$

Then we have two equations and two unknowns so we solve the system of equations. Multiply the first equation by -0.7 and add it to the second equation:

$-0.7A -0.7B = -0.7*30$

$-0.7A -0.7B = -21$

$0.2A + 0.7B = 10.5$

--------------------------------------

$-0.5A = -10.5$

$A = \frac{-10.5}{-0.5}$

$A = 21\ gallons$

We substitute the value of A into one of the two equations and solve for B.

$21 + B = 30$

$B = 9\ gallons$

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3 years ago

What is the absolute value of -3.75? (6.2B | 6.1B 6.1F)

ad-work [718]

Answer is 3.75
Absolute value is the numerical value

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3 years ago