If i got an 86 (which is a b) in class, and i've scored an 68 on a test, how much would my grade be? (plz hlp me)

Ill mark the brainliest if you me with the these three questions 7,8,9

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?