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zimovet [89]
3 years ago
6

Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multi

plied the sum by 3, it would equal 12. Which equation could Stephanie use to find the number, x?
A.
3(x) + 9 = 12

B.
3(x + 9) = 12

C.
3 + (x + 9) = 12

D.
9(x + 3) = 12
Mathematics
2 answers:
Fittoniya [83]3 years ago
5 0

Answer:

B

Step-by-step explanation:

add 9 then times 3

____ [38]3 years ago
3 0

Answer:

Step-by-step explanation:

B

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(2x-1)(x+5)(3x-2) expanded and simplified
STatiana [176]
To simplify, we can use the FOIL method. That stands for first, outer, inner, last. What we do is take two factors at a time and multiply the first terms by each other, the outer terms together, etc.

Let's start with (2x-1) and (x+5)

First: 2x * x = 2x^2
Outer: 2x * 5 = 10x
Inner: -1 * x = -x
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2x^2 + 9x - 5

Now FOIL this result with (3x - 2)

6x^3 - 4x^2 + 27x^2 - 18x - 15x + 10

Simplify:

6x^3 - 23x^2 - 33x + 10





6 0
3 years ago
X-4(3-2x) = 3(3x+4)<br> Find X
Mandarinka [93]

Answer:

all x are the solution

Step-by-step explanation:

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x - 12 + 8x = 9x +12

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(0 = 0)

no matter which number we take for x the equation will always be correct

ex. x = 3 : left : 9×3 = 27

right : 9×3 = 27

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2 years ago
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