Hamas car used 3/4 tank of gas to cross america. the gas tank on her car holds 151/2

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?