Explain how using basic fact can find 10x20x30x40 mentally

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?

A0.40 kg soccer ball is kicked so that its incoming velocity of 5 m/s is changed to an outgoing velocity of -25 m/s. what impulse does the player apply to the ball?