Solve the problem.An airplane flies 470 miles with the wind and 310 against the wind in the same length of time. If the speed of the wind is 20, what is the speed of the airplane in still air?
A. 102.5 mph
B. 38.75 mph
C. 97.5 mph
D. 87.5 mph
Answer: C
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Use the circle graph to solve the problem.There are 8000 students attending the local university. The students are asked which sport they most enjoy watching. The circle graph shows the percentage favoring each sport.
What percentage of students did not name Soccer or Volleyball as their favorite sport?
A. 40% B. 17% C. 23% D. 60%
Determine algebraically whether the function is even, odd, or neither even nor odd.f(x) = 5x5 - 5x3
A. Even B. Odd C. Neither
Factor completely. If a polynomial cannot be factored, say it is prime.6x2 - 6y2 + 5xy
A. (2x + 3y)(3x - 2y) B. (6x + 3y)(x - 2y) C. prime D. (2x - 3y)(3x + 2y)
Find an equation of variation for the given situation. s varies directly as the square of t, and s = 175 when t = 5.
A. s = 
t2
B. s = 
t2
C. s = 7t2
D. s = 35t2