Answer:
when adding fractions make sure the bottom number is the same
so for number 2 make sure both are 4 on the bottom of the fraction by multiplying by 2 maybe 1/4+2/4 that would equal 3/4 not 1
Answer:
Non-colinear means that three given points do not have a single line connecting all 3 of the points.
Sorry im not 100% sure but i do think it is right.