Greg practiced playing his clarinet for 12 minutes. he has practiced 40% of the amount of time he needs to practiced today. how many more minutes does greg need to practice today?

What percent of the circle below is shaded?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.