David practiced his saxophone for m minutes on Monday. On Tuesday, he practiced for 30 minutes more than twice as long as Monday. He practiced for 80 minutes on Tuesday. Use
values from the box to write an equation to represent how long David practiced on Tuesday.

The mathematical expression 9€ t means

The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.