How do you get the 4 as an answer 4 2 1 =4

If 25% of y is 30, what is 60% of y?

Solve the equation by completing the square. x^2+2x=17

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square