Solve the following system of equations. plz explain
-3x + 4y =64
x + 4y = 48
a. x = 8, y = 10
b x = -4, y = 13
c. x = 13, y = -4
d. x = 2, y = 17.5

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

Mikes car gets an average of 28 mpg. there are 12 gallons of fuel in mikes car when he starts his trip of 140 miles. about how many gallons are left at the end of his trip?

If the square of a positive integer is added to 2 times the integer the result is 48. find the integer.