Solve the problem and answer the question.A twin-engined aircraft can fly 1120 miles from city A to city B in 4 hours with the wind and make the return trip in 7 hours against the wind. What is the speed of the wind?
A. 80 mph
B. 40 mph
C. 60 mph
D. 100 mph
Answer: C
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Translate the phrase to an algebraic expression. Use n as the number unless otherwise indicated.the difference of a and b subtracted from the difference of c and d
A. (a - b) - (c - d) B. (c - d) + (a - b) C. (c + d) - (a - b) D. (c - d) - (a - b)
Evaluate the expression.
A. 0! B. 10 C. 1 D. 45
Determine if the sequence is geometric. If the sequence is geometric, find the common ratio.5.56, 8.38, 11.20, 14.02, . . .
A. no B. yes, 2.82 C. yes, 2.12 D. yes, 8.46
Solve the problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 37 units of vitamin A, at least 8 units of vitamin B, and at least 26 units of vitamin C. The red vitamin pills cost 
each and contain 7 units of A, 1 unit of B, and 2 units of C. The blue vitamin pills cost 
each and contain 3 units of A, 1 unit of B, and 7 units of C. How many pills should the patient take each day to minimize costs?
A. 6 red and 2 blue B. 7 red and 1 blue C. 8 red and 0 blue D. 2 red and 6 blue