7th grade math
posted by Alexis .
Can you check these problems?
1. 4x^2 + 3x  4x +5
= 4x^2  x + 5
2. m  n + m  n  n
= 2m  3n
3. (7x + 5  3y)  (3x  5 +4y)
= 7x + 3x 3y + 4y + 0
= 10x  y = 0
4. m/8  9 = 5
m/8 = 5 + 9
m = 14/8
m = 7/4 = 1 3/4
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