Find the sum, sn, of the sequence.a1 = -8, d = -9; find s6
A. -51
B. 183
C. - 183
D. -102
Answer: C
Mathematics
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Solve.A jet plane traveling at a constant speed goes 1200 miles with the wind, then turns around and travels for 1000 miles against the wind. If the speed of the wind is 50 mph and the total flight took 4 hours, find the speed of the plane in still air.
A. 550 mph B. 525 mph C. 605 mph D. 435 mph
Mathematics
Evaluate.
- 
A. -6
B. 
C. - 
D. - 
Mathematics
The graph of a piecewise-defined function is given. Write a definition for the function. 
A.
f(x) = 
B. 
C. 
D. 
Mathematics
Use a protractor to measure the angle.
A. 65° B. 25° C. 180° D. 155°
Mathematics