10 - 2x
10 - 2(7)
= 10 - 14
= -4
Answer:
40cm² there you go
Step-by-step explanation:
Area =side×side so 8×5=40
that's not why this app is for
Answer: 4n^2
Step-by-step explanation: -3n^2 - (-7n^2) = -3n^2 + 7n^2= 4n^2. When adding and subtracting the exponents stay the same only the coefficients are subtracted or added
