Answer:
39°
sum of triangle's interior angles: 180°
180°-90°-51°=39°
Answer:
you didn't put how many cookie are in one package
Step-by-step explanation:
sorry
Answer:
1,232,142
Step-by-step explanation:
bro just use a calculator
Answer: The process of combining matrices, vectors, or other quantities under specific rules to obtain their product.
Answer:2m^2+mn+2m+9n-3
Step-by-step explanation:
m(2+n-m)+3(3n+m^2-1)
open brackets
2m+mn-m^2+9n+3m^2-3
Collect like terms
3m^2-m^2+mn+2m+9n-3
2m^2+mn+2m+9n-3
