Simplify the exponential expression.x3 ? x9
A. x27
B. 27x
C. 12x
D. x12
Answer: D
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Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.A tax auditor selects every 1000th income tax return that is received.
A. Simple random B. Convenience C. Systematic D. Stratified
Solve the problem.The unit vectors u and v are combined to produce two new vectors 
and 
Show that a and b are orthogonal. Assume 
What will be an ideal response?
Set up the percent proportion for the application problem. Do not try to solve for any unknowns.In one state, the sales tax is 6%. On one purchase, the tax was $63. Find the cost of the item purchased.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer the question.Describe the graph of the function f(x) = x + 1 if the domain is the set of real numbers 
Give examples of points that are on the graph.
What will be an ideal response?