Twelve students in a class average 70% on a certain test. eighteen others average 80%. what is the overall average of the thirty students as a percent

It is 2 ½ miles to the end of the trail. If Paula runs to the end and back in 60 minutes (1 hour), what is her average speed in miles per hour?

Which shows 232 - 172 being evaluated using the difference of perfect squares method? 232 - 172 = (529 + 289) (529 - 289) = 196,320 232 - 172 = 529 - 289 = 240 232 - 172 = (23 + 17) (23 - 17) = (40) (6) = 240 232 - 172 = (23 - 17) 2 = (6) 2 = 36

Combinations are the same thing as permutations because they are an arrangement of objects where order is important. True or false

Is 3/2 greater than 1

A number is 1/7 of another number. The difference is 18

Ally borrows 22,000 for a car at a 4.2% interest rate over 4 years. how much interest does she pay

One side of a triangle is 6 cm shorter than the base, x. The other side is 4 cm longer than the base. What lengths of the base will allow the perimeter of the triangle to be at least 43 cm?

Solve 4 (5-a) - 2.1 (6a) = - 4.9

Solve the system of equations. 3x + 2y + 4z = 7 4x + 3y + 5z = 9 7x + 4y + 7z = 5 a (x = - 5, y = 3,2 = 4) b. (x = - 6, y = 4, z = 5) c. (x = - 3, y = 1, z = 6) d. (x = - 4, y = 2, z = 3)

Find the measure of N (a + 16) (a + 30) (a - 18)