What is the value of x in this equation? Enter your answer in the box. (2.4 × 103) × (3 × 10x) = 7.2 × 109

There are 15 plates and each plate is either 7 or 12 inches diameter. which systems of equations do you use to find the number of 7 inch plates, x and 12 inch plates, y

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Select the two pairs of figures that are similar.