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2 years ago

9

Can someone please help me

1 answer:

uranmaximum [27]2 years ago

6 0

Answer:

a

Step-by-step explanation:

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Fill in the missing number to complete the factorization<br> x3 + x2 - 21x - 45 = (x + 3)(x - 5)(x +

Olin [163]

Answer:

3

Step-by-step explanation:

Let the missing number be $k$ .

Then we have $x^3+x^2-21x-45=(x+3)(x-5)(x+k)$

We expand the right hand side to get:

$x^3+x^2-21x-45=x^3+kx^2-2x^2-2kx-15x-15k$

By comparing constant terms we get:

$-15k=-45$

Divide both sides by -15

$k=\frac{-45}{-15}=3$

Therefore the missing number is 3

4 0

3 years ago

PLEASE HELP MEEEEEEEEEEEEEEEE

Tom [10]

Answer:B is the answer

Step-by-step explanation:

TRUSt

5 0

3 years ago

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The equation s = 20h + 10 predicts Mary's score, s, on her next math test based on the number of hours, h, Mary studies. If the

Flura [38]

Answer:

s= 65

Step-by-step explanation:

The given quation s = 20h + 10

h= number of hours

Where h= 2.75 hours

If we substitute h into given model equation, we have

s = 20(2.75)+ 10

s=55 +10

s= 65

Hence, her score is 65

5 0

3 years ago

How much does 9 m equal to ? Mm

Sveta_85 [38]

Answer:

9000mm

Step-by-step explanation:

You multiply 9 by 1000 to turn m to mm

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3 years ago

Give an example of a problem that involves adding two integers and the answer is -12.

abruzzese [7]

Answer:

-16 + 4 = -12

Step-by-step explanation:

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3 years ago

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