.1. A plane flying with the jet stream flew from City A to City B, a distance of 2220 mi, in 6 h. Flying against the jet stream, the plane could fly only 1980 mi in the same amount of time. Find the rate of the plane in calm air and the rate of the wind. Plane____mph Wind_____mph

2.A whale swimming against an ocean current traveled 190 mi in 5 h. Swimming in the opposite direction, with the current, the whale was able to travel the same distance in 2.5 h. Find the speed of the whale in calm water and the rate of the ocean current. Whale____mph wind____mph

3.The bird capable of the fastest flying speed is the swift. A swift flying with the wind to a favorite feeding spot traveled 80 mi in 0.5 h. On returning, now against the wind, the swift was able to travel only 45 mi in the same amount of time. What is the rate of the swift in calm air, and what was the rate of the wind?

Swift___mph Wind____mph

4.A Boeing Apache Longbow military helicopter traveling directly into a strong headwind was able to travel 420 mi in 2.5 h. The return trip, now with a tailwind, took 1 h 45 min. Find the speed of the helicopter in calm air and the rate of the wind. Helicopter___mph Wind_____mph

5.A baker purchased 15 lb of wheat flour and 10 lb of rye flour for a total cost of $20.25. A second purchase, at the same prices, included 11 lb of wheat flour and 14 lb of rye flour. The cost of the second purchase was $20.85. Find the cost per pound of the wheat flour and of the rye flour.

Wheat $_____per pound Rye $____per pound

6.The employees of a hardware store ordered lunch from a local delicatessen. The lunch consisted of 4 turkey sandwiches and 7 orders of french fries, for a total cost of $13.90. The next day, the employees ordered 5 turkey sandwiches and 5 orders of french fries totaling $14.75. What does the delicatessen charge for a turkey sandwich? What is the charge for an order of french fries? Turkey Sandwich $_______ French Fries $_________

7.A pastry chef created a 50-ounce sugar solution that was 26% sugar from a 40% sugar solution and a 20% sugar solution. How much of the 40% sugar solution and how much of the 20% sugar solution were used?

40 % sugar solution_______ 20% sugar solution_____

8.Two angles are supplementary. The measure of the larger angle is 20 more than three times the measure of the smaller angle. Find the measures of the two angles. (Supplementary angles are two angles whose sum is 180.)

First angle_________ Second angle________

9.An investor has $9000 to invest in two accounts. The first account earns 7% annual simple interest, and the second account earns 9% annual simple interest. How much money should be invested in each account so that the annual simple interest earned is $600? (If not possible, enter IMPOSSIBLE.)

7%________ 9%______________