Fill in the blank.The opposite of -16 = 
.
A. -16
B. 0
C. 16
D. 
Answer: C
Mathematics
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Solve. First isolate the radical term.
+ 9 = 0
A. - 6561 B. No solution C. 9 D. 6561
Mathematics
Solve the problem.In one area, the lowest angle of elevation of the sun in winter is 21° 7'. A fence is to be built 
away from a plant in the direction of the sun. (See drawing) Find the maximum height, x , for the fence so that the plant will get full sun. Round your answer to the tenths place when necessary.
A. 5.1 ft B. 4.1 ft C. 4.8 ft D. 6.3 ft
Mathematics
Simplify.42 + 92
A. 26 B. 169 C. 52 D. 97
Mathematics
Solve.
= 9
A. {-7, 11} B. {7} C. ? D. {7, -11}
Mathematics