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cestrela7 [59]
3 years ago
13

Verbal expression for 3x^2

Mathematics
1 answer:
slega [8]3 years ago
6 0
One expression could be three x to the power of two. Let me know if that's right :)
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Answer:

x=-2

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Step-by-step explanation:

3=y+3x ---- A

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step 1. rearrange equation A, so you have the "y" variable on one side

3=y+3x

-3x     -3x

3-3x=y

y=3-3x ---- C

step 2. Substitute equation C into equation B in place of "y"

-x+3(3-3x)=29 ---foil

-x+9-9x=29 -- collect like terms

-10x+9=29

       -9     -9

   -10x=20

      ÷-10     ÷-10

         x=-2

Step 3. Substitute x=-2 into equation C to find y

y=3-3(-2)

y=3+6

y=9

Check you answer by subsituting x=-2 and y=9 back into equation A and B

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2 years ago
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