1.solve

2x-3y=7

3x+2y=6

2...solve the formula

l:P=2l+2w

3..solve the following quadratic equations using the method of your choice

a)3y^2+y+1=0

b) (x-3)^2=20

4.. when a plane flies with the wind, it can travel 2160 miles in 3 hours. when the plane flies in the opposite direction, against the same wind , it takes 4 hours to fly the same distance. find the speed of the plane in still air and the speed of the wind.