Simplify the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: C
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Add.3223 + 2131
A. 5336 B. 5532 C. 5453 D. 5354
Solve the problem.Given f(x) = x2 - 5x - 7, find f(0).
A. 7 B. 0 C. -7 D. 49
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__tttt0527191430__f1q101g4.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. 4.5 sec; 276 ft
B. 5 sec; 200 ft
C. 3.5 sec; 404 ft
D. 4 sec; 344 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
Find an equation of the line:with y-intercept (0, 2) and slope - 
.
A. y = 
x - 2
B. y = - 
x - 2
C. y = - 
x + 2
D. y = 
x + 2