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3 years ago

A variable needs to be eliminated to solve the system of equations below.

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

8 0

Answer:

The variable that needs to be eliminated in these systems of equations are 3x

Step-by-step explanation:

-3x + 4y = -50

3x + 3y = -6

*solve from top to bottom, if that makes sense, so add 3x to -3x, 4y to 3y, and -50 to -6.*

0 + 7y = -56

7y = -56

*divide by 7 to get y alone*

y = -8

plug y into one of the original equations to get x

-3x + 4y = -50

-3x + 4(-8) = -50

-3x - 32 = -50

+32 +32

-3x = -18

x = 6

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I know only one answer whats the other one help me image-

miv72 [106K]

Answer:

A. 4(4a + 18)

B. 8(2a + 9)

Step-by-step explanation:

<u><em>We know that</em></u> :

16a = 4×4×a

72 = 4×18

Then

16a + 72 = 4×(4a) + 4×(18)

= 4 × (4a + 18)

On the other hand,

16a = 8×2×a

72 = 8×9

Then

16a + 72 = 8×(2a) + 8×(9)

= 8 × (2a + 9)

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2 years ago

Christian is a professional chef for a restaurant who also runs a small catering business. Christian did not have enough withhel

diamong [38]

Answer:

He should pay his paychecks in time.

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4 years ago

Which of these is the algebraic expression for "4 times the sum of 2 and y?"

Volgvan

Answer:

$4(2 + y)$

Step-by-step explanation:

"4 times the sum of 2 and y".

<h3>Hope it is helpful...</h3>

5 0

3 years ago

Read 2 more answers

Sean is employed as a truck driver. He drives x hours a week and is paid $21.60 per hour. Also he is paid $250 for food per week

allsm [11]

Answer:

Hours driven= 40 hours

Step-by-step explanation:

Giving the following information:

Variable income= $21.6 per hour

Fixed income= $250

Total income= $1,114

<u>To calculate the number of hours driven, we need to use the following formula:</u>

Total income= fixed income + hourly rate*number of hours

1,114 = 250 + 21.6*x

864 = 21.6x

864 / 21.6 = x

40=x

Hours driven= 40 hours

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3 years ago

Nicholas drew a triangle with 45, 35, and 100 degree angles. Is there another triangle with the same three angles but different

Anna11 [10]

Answer:

Yes, there are infinite triangles with the same three angles but different side lengths

Step-by-step explanation:

we know that

If two triangles are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

therefore

There are infinite triangles with the same three angles but different side lengths

6 0

3 years ago