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daser333 [38]
3 years ago
11

If B = -m +1 - 9m2 and A = m + 9, find an expression that equals 2B – 2A

Mathematics
1 answer:
photoshop1234 [79]3 years ago
5 0

Answer:

- 18m² - 4m - 16

Step-by-step explanation:

2B - 2A

= 2(- m + 1 - 9m²) - 2(m + 9) ← distribute both parenthesis

= - 2m + 2 - 18m² - 2m - 18 ← collect like terms

= - 18m² - 4m - 16 ← in standard form

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Line AB contains points A (8, −4) and B (1, −5). The slope of line AB is....
shutvik [7]

Answer:

The\ slope\ of\ the\ line\ AB\ is \frac{1}{7} .

Step-by-step explanation:

Formula for slope

m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}

As the Line AB contains points A (8, −4) and B (1, −5).

Put points value in the above

m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}

m = \frac{- 5- (-4)}{1 - 8}

m = \frac{- 5 + 4}{1 - 8}

m = \frac{- 1}{-7}

m = \frac{1}{7}

Therefore\ the\ slope\ of\ the\ line\ AB\ is \frac{1}{7} .

7 0
3 years ago
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How many inches will it be 54in by 42in
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It's actually 2268 square inches, or in with a little two in the corner
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3 years ago
Hello people again please help
densk [106]
Ok so a triangle is equal to 180 degrees!!!
So with that info u can make a crazy little equation
180=70+68+47+x
Ok then you add 70,68 and 47
180=185+x
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3 0
2 years ago
What is the steps and answer to do this question -x-7y=9 -x+9y=-23
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The answer is 23.

Good luck :)
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3 years ago
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never [62]

Answer:

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