Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 
B. -4
C. 2
D. - 
Answer: A
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Solve by graphing. Label the axes and show where the solution is located on the graph.Suppose the sales of a particular brand of appliance satisfy the relationship 
where y represents the number of sales in year x, with 
corresponding to 1982. Find the number of sales 
.
A. 7380 B. 3720 C. 7440 D. 3660
Find the indicated matrix.Let A = 
and B = 
. Find AB.
A. 
B. not defined
C. 
D. 
List the intercepts for the graph of the equation.y = x2 + 9
A. (0, 9) B. (9, 0) C. (0, 9), (-3, 0), (3, 0) D. (9, 0), (0, -3), (0, 3)
Write the matrix equation as a system of linear equations without matrices.
= 
A. -7x1 + x2 + x3 = -8 x1 - 5x2 = 8 B. -7x1 = -8 x1 + x2 = 8 -8x1 - 5x2 = -7 C. -7x1 + x2 = -8 x1 + 8x2 = 8 -8x1 - 5x2 = -7