Tammy completed the following steps to simplify the expression

-5x²y - 3xy² - 2 (4y + 2) - 2.5x²y.

-5x²y - 3xy² - 2 (4y) + 2 (2) - 2.5x²y

-5x²y - 3xy² - 8y + 4 - 2.5x²y

(-5x²y - 3xy² - 2.5x²y) - 8y + 4

(-5 - 3 - 2.5) x²y - 8y + 4

-10.5x²y - 8y + 4

Explain why Tammy's solution is incorrect. Then show how to correctly simplify the expression.

Question

Mathematics

Greyson Hurst

14 May, 17:23

Tammy completed the following steps to simplify the expression

-5x²y - 3xy² - 2 (4y + 2) - 2.5x²y.

-5x²y - 3xy² - 2 (4y) + 2 (2) - 2.5x²y

-5x²y - 3xy² - 8y + 4 - 2.5x²y

(-5x²y - 3xy² - 2.5x²y) - 8y + 4

(-5 - 3 - 2.5) x²y - 8y + 4

-10.5x²y - 8y + 4

Explain why Tammy's solution is incorrect. Then show how to correctly simplify the expression.

+3

Answers (1)

Know the Answer?

Camila Watkins · Answer 1

the third term wasn't distributed properly the - 2 has to multiply by + 2 = - 4

Step-by-step explanation:

-5x^2y - 3xy^2 - 2 (4y+2) - 2.5x^2y

-5x^2y - 3xy^2 - 8y - 4 - 2.5x^2y

-7.5x^2y - 3xy^2 - 8y - 4