-9x-3y=-18 -3x+y=4 solve the system of equation

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

Askateboard ramp is in the shape of a right triangle what is the height of the ramp