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2 years ago

Solve the system of equations - 4x + 4y = -4 and - 4x + 2y = 16 by combining the equations.

Mathematics

1 answer:

EastWind [94]2 years ago

7 0

Esti handi rau de tot coardo

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20 Points + Brainliest for the answer and Explanation!!!

Vlad1618 [11]

Answer:

$P+Q=5x^2+4$

$Q-P=-x^2-4x+16$

Step-by-step explanation:

We are given

$P=3x^2+2x-6$

$Q=2x^2-2x+10$

Calculation of P+Q:

$P+Q=3x^2+2x-6+2x^2-2x+10$

now, we can combine like terms

$P+Q=3x^2+2x^2+2x-2x+10-6$

$P+Q=5x^2+0+4$

$P+Q=5x^2+4$

Calculation of Q-P:

$Q-P=2x^2-2x+10-(3x^2+2x-6)$

Firstly, we will distribute negative sign

$Q-P=2x^2-2x+10-3x^2-2x+6$

now, we can combine like terms

$Q-P=2x^2-3x^2-2x-2x+6+10$

$Q-P=-x^2-4x+16$

8 0

2 years ago

Which of the following does not belong to the solution set of -3x + 7 < 11?

erik [133]

-3x+7<11

-3x<4

x>-4/3

So anything less than or equal to -4/3 does not belong to the solution set.

With your update:

"<span>The options is 4,-1,-5,and 0"

-5 does not belong to the solution set...</span>

7 0

2 years ago

Read 2 more answers

Determine which of the following equations, when graphed, intersect at the point (4, 0). Select all that apply. x - y = 4 -x - y

Elza [17]

Answer: only (x-y=4) and (x+y=4).

Step-by-step explanation:

Notice target point has y=0, so all terms with y are zero. Then all 6 equations reduce to m x = k, for various m and k. So calculate 4×m and compare to k six times.

x - y = 4 4=4 yes

-x - y = 4 -4=4 no

2x - y = 7 8=7 no

x + y = 4 4=4 yes

2x + y = 7 8=7 no

2x + y = -7 8=-7 no.

6 0

3 years ago

Read 2 more answers

One team c 82.5% of the football players weigh more then 200 pounds if 40 men are on the team how many weigh more then 200 pound

valentinak56 [21]

The answer is 33 because 40*0.825 or 40*82.5% is 33 men.