An agriculture researcher wants to test the effect of nine soil additives by adding four at a time to different rows of the
same plant. how many different combinations can be tested?
756

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.

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable