P L E A S E H E L P M E W I LL SC A M Y O U I F U T A K E M Y P O I N T S

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.

Solutions for 2x+7 less than or equal to 3x-5

Julie buys 2kg of apples and 7kg of pears ? 12.70. the pears cost ? 1.30 per kilogram what is the price per kilogram of the apples? show your working out