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Galina-37 [17]
3 years ago
15

If M=5x^2+7x-4 and N=-3x^2-4x+5, then M-N equals

Mathematics
1 answer:
Phantasy [73]3 years ago
4 0

Answer:

8x² + 11x - 9

Step-by-step explanation:

M - N

= 5x² + 7x - 4 - 1(- 3x² - 4x + 5) ← distribute parenthesis by - 1

= 5x² + 7x - 4 + 3x² + 4x - 5 ← collect like terms

= 8x² + 11x - 9

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What is the value of x?
ella [17]

Answer:

x=70

Step-by-step explanation:

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Combine like terms

40+2x = 180

Subtract 40 from each side

40-40+2x= 180-40

2x= 140

2x/2 =140/2

x =70

5 0
3 years ago
Plz can some one look at this
Delicious77 [7]
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3 years ago
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B, is the correct answer
3 0
3 years ago
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3 years ago
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Cos^2 2A+4sin^2A×cos^2 A=1
Nonamiya [84]
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3 0
3 years ago
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