At BBQ Shack they only sell ribs, the cost of a half rack x is $10 and the cost of a full rack y is $20. The manager's goal for the day is to have at least 25 customers buy ribs, and to have
total sales be greater than $300. Write a system to represent this situation.

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota