Answer:
6xy²+7-x²y²-5x²y+3x²y²=6x²+7+2x²y²-5x²y
Answer:

Step-by-step explanation:
we know that
Landon finished 1/2 of the test in 3/5 of an hour
so
by proportion
Find out how much of the test will he have done in one hour

I think it is the second one but im not for sure
I hope that helped you
Answer:
quadrillion, hope this helps
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
am not sure but I think its C am not shure