If you're parents say to not talk to strangers then how do you make friends?

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.

Write the expression 7x^3-28xy^2 as the product of 3 factors

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.