Let f(x)=2x−1. If 3f(a)=15, what is the value of f(2a)?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.