Subtract.-19 - (-19)
A. 38
B. -38
C. -361
D. 0
Answer: D
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Solve.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 2 hours and uses 18 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 5 hours.
A. 10 gallons B. 54 gallons C. 50 gallons D. 45 gallons
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(10x3)-2
A. 
B. 
C. 
D. 100x6
Use identities to write the expression as a single function of x or ?.cos (? - ?)
A. sin ? B. -cos ? C. cos ? D. -sin ?
Perform the indicated operation. Assume that all variables are nonnegative.
+ 
+ 
+ 
A. 40
+ 12
B. 8
+ 12
C. 
+ 
+ 12
D. 8
+ 
+ 