**ANSWER QUICKLY PLEASE** which expression is equivalent to 0.5y+10.5+6.5y-0.5-0.5y?

7.5y-10

7.5y+11

6.5y+10

6.5y-11

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −