How to convert 68.75% into a decimal in lowest form

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis