1. 17
4. 11 2/5
7. 45 15/16
The answers would be -3, -2, -1, 0
7( n+3)-4n
=7n+21-4n
=7n-4n+21
=3n+21 you can leave it like this also but
=3(n+7) doing this is best
Answer:
4:
a.) 49x^2-36y^2
b.) 9a^2-25b^2
c.) 1/25x^2-49
5: b.) -5x^2-4xy+4y^2
Step-by-step explanation:
Density = Mass x Volume
D = 600g x 150
D = 90,000