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Nadya [2.5K]
3 years ago
13

How do you solve this system by elimination?

Mathematics
1 answer:
zimovet [89]3 years ago
8 0
(-5x+7y=11) - (-5x+3y=19) =
4y = -8. (divide both sides by 4)

y = -2

Substitute

-5x + 7(-2) =11
-5x - 14 =11
-5x = 25

x = -5



y = -2 and x = -5
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5x(3x+2)-4(2x-1)<br><br><br><br> Yea i needd help
UkoKoshka [18]

Answer: 15x² + 2x + 4

x = -2/3, 0, 1/2

Step-by-step explanation:

5x(3x + 2) - 4(2x - 1)

First, distribute:

15x² + 10x - 8x + 4

Combine like terms:

15x² + 2x + 4

This is your polynomial!

If you needed to solve for x, take your original factored polynomial and set each term equal to 0:

5x(3x + 2) - 4(2x - 1)

5x = 0

x = 0

3x + 2 = 0

3x = -2

x = -2/3

-4 = 0

No solution

2x - 1 = 0

2x = 1

x = 1/2

x = -2/3, 0, 1/2

Hope this helps!

4 0
3 years ago
Can someone give me the answer to this?
Delicious77 [7]
The correct formula would be C

multiply principle ( $800) by (1+interest rate as a decimal) to the power of number of years
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6 0
3 years ago
6 girls share 4 brownies equally. What fraction of the brownies does each friend get?
aliina [53]

Answer:

2/3

Step-by-step explanation:

You have 6 friends who want to share 4 brownies equally. You simply divide the 4 brownies by 6 people:

4/6 = 2/3 (simplified)

So each friend gets 2/3 of a brownies

[RevyBreeze]

3 0
2 years ago
1) Use the number line to help you answer this question.
masya89 [10]

Answer:

Step-by-step explanation:

Download pdf
4 0
2 years ago
Read 2 more answers
PLEASE HELP The coefficients of the first four terms in the expansion of (a + b) ^5 are a) 1, 3, 5, 7 b) 1, 4, 6, 4 c) 1, 2, 3,
xeze [42]

Answer:

D is the correct answer

Step-by-step explanation:

Fifth row of Pascal pyramid is 1 , 5, 10, 10, 5 , 1

The expansion should always have n + 1 number of terms

Where n is the power

5 0
3 years ago
Read 2 more answers
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