Answer:
ur in big trouble. cuz if i cant answer that no one can .Trust me .its harder than i thought but i am sorry
On the first one u would -9
On the 2 = j=1/3v
3rd one that false
Answer:

Step-by-step explanation:
"the product of 13 and a number M" should be written as 13m.
To get a fourth of the produce we would need to divide it by four.
A fourth of the product of 13 and a number M should be
.
Hope this helps.