What expressions are equivalent to - 56z + 28

What is the value of this expression? 18 + 3 X (10 - 2) Enter your answer in the box.

The average (mean) of 90 numbers is 60, and the average of 60 numbers is 90. What is the average of all the numbers?

3[ (5) / (-9) (6) / (-2) ]-2[ (0) / (-2) (2) / (-4) ]

4 freshman boys, 6 freshman girls, and 6 sophomore boys go on a trip. How many sophomore girls must join them if a student's gender and class are to be independent when a student is selected at random?

A rectangle has a length of 4 cm, a width of 3 cm, and an area of 12 cm. What is the perimeter of the rectangle?

Samsons diner sold 80 milkshakes. 25% of the milkshake had whipped cream on top. How many milkshakes with whipped cream were sold

Estimate the product of 21 and 32

Nathan just bought a car. He models the value, V, in dollars, of the car after t years as V (t) = 21,000 (0.861) ^t. Based on this model, by what percent does the value of Nathan car decrease each year?

Round each decimals to the nearest whole number 6.7

Sally just got back from the vacation with her family. They had been driving for 3 days travelling 8 1/2 hours every day. How many hours were they in the car altogether.