To find the sum:

${7a}^{3} + 14a + 12 + ( {- 6a }^{3} ) + {12a }^{2} - 7 \\ = {7a }^{3} - {6a}^{3} + {12a }^{2} + 14a + 12 - 7 \\ = {a}^{3} + {12a }^{2} + 14a + 5$
Therefore the answer is a^3+12a^2+14a+5.
Hope it helps!

8 0

3 years ago

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Assignment Mode : Open

krok68 [10]

The answer is 300 divided by 20 which you would get 15.

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3 years ago

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Below is a series of steps Mel took to solve an equation. She got the wrong answer. Find Mel's mistake. Then, use order of opera

Inessa [10]

Answer: x = 9

Mel's mistake was in the last step, she multiplied by 2 instead of dividing by 2

Step-by-step explanation:

2x + 1 = 19

Subtract 1 from each side

2x = 18

Divide by 2

x = 9

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3 years ago

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