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alex41 [277]
3 years ago
14

Marcus finds that (3x^2-2y^2+5x)+(4x^2+12y^2-7x)=7x^2-10y-2x. What error did Marcus make?

Mathematics
2 answers:
ale4655 [162]3 years ago
7 0

Answer:

He combined the terms –2y2 and 12y2 incorrectly.

boyakko [2]3 years ago
4 0

Answer:

7x^2+10y^2-2x is the correct answer, Marcus put -10y INSTEAD of +10y^2

Step-by-step explanation:

(3x^2-2y^2+5x)+(4x^2+12y^2-7x)

Combine like terms- I'll add x^2 first, then y^2, and then finally x, and it will be in that order.

7x^2+10y^2-2x

Make sure to check your signs are correct, and you wrote down the proper exponents.




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Hey there!

To solve this problem, first turn the mixed numbers to improper fractions then multiply 2 2/3 and 1 1/4 . . .

2 2/3 = 8/3
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= 40/12

Simplify 40/12 . . .

40/12 = 3 1/3 <--------

The answer to your question is option B.

The bananas weighed 3 1/3 pounds.

Hope this helps you.
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3 years ago
32ax + 12bx - 48ay - 18by<br><br>factor the polynomial​
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Answer:

(16a + 6b) (2x - 3y)      

Step-by-step explanation:

32ax + 12bx - 48ay - 18by

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Answer:

Step-by-step explanation:

Given the equation solved by Morgan, Dakota and Taylor expressed as 7x+5x+1=73, to get the value of x, the valid steps are as shown;

7x+5x+1=73

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subtract 1 from both sides

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Divide both sides by 12

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Based on the calculation above, the students with invalid first step is Dakota.

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