Jackie has a poster that is 7 inches wide by 10 inches long. She wants to enlarge it so that its length is 20 inches. What should the width be?

Use set buikder notation to represent the following set: {, -2, -1, 0}

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.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.