Sam left a 18% tip on a 55$ dinner bill. A- how much was the tip? B- what was the total bill?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !