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Marina86 [1]
3 years ago
11

Need help plzzzzzzzxzzxzx

Mathematics
1 answer:
nasty-shy [4]3 years ago
4 0

Answer:

2239grams

Step-by-step explanation:

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3 years ago
Read 2 more answers
PLS HELP WILL MARK BRAINLIEST NO FAKE ANSWERS
denis-greek [22]

Answer:

1.  -3x^2 + 13x + 5

2. 10y^2 - 7

Step-by-step explanation:

1. (7 + 4x - 8x^2) - (2 - 9x - 5x^2)

Combine Like Terms —›

(7) - (2) = 5

(4x) - (-9x) —› (4x) + (9x) = 13x

(-8x^2) - (-5x^2) —› (-8x^2) + (5x^2) = -3x^2

-3x^2 + 13x + 5

2. (2y^2 + 5xy - 8) - (5xy -1 - 10y^20)

(2y^2) - (-10y^2) —› (2y^2) + (10y^2) = 10y^2

(5xy) - (5xy) = 0

(-8) - (-1) —› (-8) + 1 = -7

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