I need help it needs to be done today but i dont know the answer

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Select the correct answer from each drop-down menu. the length of a rectangle is 5 inches more than its width. the area of the rectangle is 50 square inches. the quadratic equation that represents this situation is the length of the rectangle is inches.

Solve the triangle. a = 21°, c = 105°, c = 5