Answer:
I don't really remember this very well, because it confusing me
78 is the significant figure because in maths 0's are not considered significant. Read more into significant figures to help you out.
Answer C : 3x^2+7xy-2y^2
equivalent to the following expression
Combine like terms
2x^2 + x^2 is 3x^2
4xy+3xy is 7xy
-y^2-y^2 is -2y^2
So expression becomes
Answer C is correct
Answer:
It's A.
Step-by-step explanation:
2^3 •2^7 = 1024
2^10 = 1024
Hey! Your answer would be 2.