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3 years ago

7x2 + 4x - x2 whats the answer?!?

Mathematics

2 answers:

zepelin [54]3 years ago

3 0

Answer:

14 + 2x I think

Step-by-step explanation:

Wait for more responses if needed

ira [324]3 years ago

3 0

Answer:

${6x}^{2} + 4x$

Step-by-step explanation:

1) Collect like terms.

$(7 {x}^{2} - {x}^{2} ) + 4x$

2) Simplify.

${6x}^{2} + 4x$

Therefor, the answer is 6x² + 4x.

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Is this a proportional relationship?

Vesna [10]

Answer: yes, because it is a straight line and is on the origin and goes through the origin so it is a proportional relationship

hoped this helped let me know if it did

7 0

3 years ago

What are the solutions to the following system of equations? y = x2 + 3x − 7 3x − y = −2 (2 points) (3, 11) and (−3, −7) (11, 3)

Minchanka [31]

ANSWER

(3, 11) and (−3, −7)

EXPLANATION

The given system of equations are:

$y = {x}^{2} + 3x - 7$

and

$3x - y = - 2$

or

$y = 3x + 2$

We equate the two equations to obtain,

${x}^{2} + 3x - 7 = 3x + 2$

We rewrite in standard quadratic form to obtain,

${x}^{2} + 3x - 3x - 7 - 2 = 0$

This simplifies to

${x}^{2}- 9= 0$

We solve for x to obtain,

${x}^{2} = 9$

$x = \pm \sqrt{9}$

$x = \pm 3$

$x = 3 \: or \: x = - 3$

When
$x = 3$

$y = 3(3) + 2 = 11$

When x=-3,

$y = 3( - 3) + 2 = - 7$

Therefore the solution for the system is (3, 11) and (−3, −7).

7 0

2 years ago

Read 2 more answers

Sue deposited $52 into her bank account, so she currently has $12 in her account. What was her balance before the deposit?

Semenov [28]

Answer:

-40

Step-by-step explanation:

12 - 52 = -40

hope this helps...

7 0

3 years ago

Read 2 more answers

Which expression is equivalent to 7a^3(6a^2+a^2)-4a^6?

Thepotemich [5.8K]

Simply simplify:

7a³(7a²)-4a^6 ⇒ 49a^6 - 4a^6 ⇒ 45a^6

Hope that helps!

3 0

3 years ago

Help me now plsss! can't think this one out.

ra1l [238]

She worked 30 hours per week.

The problem turns out to be the following:
2x+15=3x-15.
First you need to have only one x variable so you subtract the X's:
3x-2x=X
The problem now turns into 15=x-15.
You have to isolate the X so you do x+15. You have to do the same to the other side so 15+15=30, therefore x=30

8 0

2 years ago