Admission to a car show cost $5 for each ticket. after selling only 20 tickets, they decided to lower the price to $3 each. if they raise $217, how many tickets did they sell in all?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !