When a number n is decreased by 12 and then the result is multiplied by 3, the product is equal to 21 . Write an equation and solve it to find the value of n . The equation is , The value is .

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Which of the following is not a subset of {1,2,3}?

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°