Express the following using negative exponents.
A. 7-x+1
B. 7-x
C. x-7
D. x7
Answer: C
Mathematics
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Simplify the expression. Assume all variables represent nonzero real numbers.(-3x)2
A. 6x B. -9x2 C. 9x2 D. -6x
Mathematics
Solve the problem.A mechanic uses an average 
gallon gear lube to service each tractor differential. Find the number of tractors that can be serviced with 16 gallons of gear lube.
A. 20 tractors
B. 12
tractors
C. 4 tractors
D. 64 tractors
Mathematics
Find the slope and the y-intercept.y = -2x
A. m = 0; b = -2 B. m = 2; b = 0 C. m = 0; b = 2 D. m = -2; b = 0
Mathematics
The length and width of a rectangular garden are 16 meters and 11 meters, respectively. A walkway of widthxsurrounds the garden. ?Write the equation for the perimeteryof the walkway in terms ofx. ?
A. 
B. 
C. 
D. 
E. 
Mathematics