Use interval notation to represent all values of x satisfying the given conditions.y = 
- 
- 
and y is at least 0.
A. (-?, -5]
B. (-?, -5)
C. (-5, ?)
D. [-5, ?)
Answer: D
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Solve by separating the two absolute values into equal and opposite cases.
= 
A. {- 
, - 
}
B. {
, - 6}
C. {
, 
}
D. ?
A hot air balloon is drifting at an altitude of 2550 ft. The balloon needs to descend to an altitude of 1000 ft. How many feet must the balloon descend?
A. 3550 ft B. 1550 ft C. 1600 ft D. 1650 ft E. 1450 ft
Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 5% cement should he mix with 5 bags of 18% cement to produce a mix containing 10% cement?
A. 13 bags B. 10 bags C. 18 bags D. 8 bags
Find the length of the third side of the right triangle. Where appropriate, give both an exact answer and an approximation to three decimal places.
A. 
= 175.5
B. 
? 3.606
C. 
? 18.735
D. 
? 21.190