In the computer lab, 120 out of the 480 computers were broken. what percent of the computers were not broken?

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

Sum is 17 and their difference is 3