Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 
- 
A. -5
B. -5x
C. -5x
D. 7x
Answer: C
Mathematics
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Add or subtract measurement numbers, rounding to the correct precision.17 mph + 38.6 mph + 65 mph
A. 120 mph B. 120.5 mph C. 120.6 mph D. 120.7 mph
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There are 65 students in Jose's class. 
of the students are science majors. How many students are science majors?
A. 39 B. 24 C. 130 D. 26
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 
A. Not one-to-one
B. f-1(x) = 
C. f-1(x) = x2 - 9, x ? 0
D. f-1(x) = (x + 9)2
Mathematics
Convert. When necessary, round the answer to two decimal places.4
gallons = ____ pints
A. 34
B. 68
C. 8
D. 17
Mathematics