Ms. sellars bought some markers to use in her classroom. she bought 15 packs of markers. if each pack contains 12 markers, how many markers did she buy?
a
30

b
60

c
150

d
180

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.

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

Which expression converts 45 degree to radians