In problems 1-2, tell whether the ordered pair is a solution to the system of equations.

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

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 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1