Write an expression that is equivalent to 8k²+2(3k+5) + 4k²- 2(2k+1)

An astronaut drops a rock into a crater on the moon. the distance, d(t), in meters, the rock travels after t seconds can be modeled by the function d(t)0.82. what is the average speed, in meters per second, of the rock between 5 and 10 seconds after it was dropped?

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

The actual length of side y is 22 cm. use the scale drawing to find the actual length of side x. a) 15.2 cm b) 17.1 cm c) 18.0 cm d) 28.3 cm