Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. -17
-2
+ 11
- 3
A. -6
- 5
B. -6
- 
C. -28
- 5
D. -28
+ 
Answer: A
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Solve the problem.A person at the top of a 600 foot tall building drops a yellow ball. The height of the yellow ball is given by the equation src="https://sciemce.com/media/4/ppg__10707191909__f1q62g4.jpg" alt="" style="vertical-align: -4.0px;" /> where h is measured in feet and t is the number of seconds since the yellow ball was dropped. Find the time that the balls are the same distance above the ground and find this distance.
A. 5 sec; 200 ft
B. 4.5 sec; 276 ft
C. 4 sec; 344 ft
D. 5.5 sec; 116 ft
where h is measured in feet and t is the number of seconds since the yellow ball was dropped. A second person, in the same building but on a lower floor that is 
from the ground, drops a white ball 
after the yellow ball was dropped. The height of the white ball is given by the equation
If you are driving at a constant speed, the distance you travel is proportional to the time you spend driving. Using D for the distance traveled, in miles, t for the time, in hours, that you drive, and r for the constant of proportionality, express the proportionality relation using a formula. ?
A. 
B. 
C. 
D. 
Solve the problem.For what values of t is r(t) = cos ti + sin tj + 
k continuous?
A. {t ? ?: -5 < t < 5} B. {t ? ?: t ? 5} C. {t ? ?: -5 ? t} D. {t ? ?: -5 ? t ? 5}
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. {(2, -1, 4)} B. {(-1, 2, 1)} C. {(2, 1, 6)} D. ?