Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.x-7
A. - 
B. x1/7
C. 
D. -x7
Answer: C
Mathematics
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Solve the equation.21 = -16 + x
A. x = 5 B. x = -5 C. x = -37 D. x = 37
Mathematics
Solve the problem.In one state, speeding fines are determined by the formula 
where F is the cost, in dollars, of the fine if a person is caught driving x miles per hour. If the fine comes to $207, how fast was the person driving?
A. 97 mph B. 85 mph C. 87 mph D. 89 mph
Mathematics
Solve.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 36 watches B. 40 watches C. 72 watches D. 35 watches
Mathematics
Divide.
A. 14 B. 0.00014 C. 0.014 D. 1.4
Mathematics