How much does 2.5 L of oil cost if 2,000 mL costs $5.00?
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Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.