Can u please help me solve these math problems?

Question

1)A gasoline company plans to mix some gasoline worth $1.45 per gallon with some worth $1.20 per gallon to make 100 gallons to sell for $1.30 per gallon. How much of each type of gasoline should be used.

and

Greg took a speedboat 64miles downstream in 2 hours. It took him 4 hours to return upstream. What was the speed of the current? How fast would his boat go in still water.

Answer 1

1) 1.45x + 1.20(100-x) = 1.30(100)
1.45x + 120 - 1.20x = 130
.25x + 120 = 130
.25x = 10
100(.25x) = 10(100)
25x = 1000
x = 40
40 gallons of the $1.45 gas and 60 gallons of the $1.20
gas

2) Let x = speed of boat and y = speed of current
x + y = speed of boat downstream and x - y = speed of boat
upstream
R * T = D
downstream: (x + y) * 2 = 64
2x + 2y = 64
x + y = 32

upstream: (x - y) * 4 = 64
4x - 4y = 64
x - y = 16

x + y = 32
x - y = 16
________
2x = 48
x = 24

24 + y = 32
y = 8

Rate of boat in still water is 24 miles per hour and rate of stream is 8 miles per hour.

Answer 2

Please at least try to do your own homework before begging some of us to do it for you. This doesn't teach you anything for us to do it. Now get off the computer and at least make an attempt.