Combine like terms.3n + 8n4 + 7n + 5n4
A. 10n + 13n4
B. 10n + 8n4 + 5
C. 3n + 13n4 + 7
D. 3n + 6n4
Answer: A
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Solve the problem.For what value of a is the volume of the tetrahedron formed by the coordinate planes and the plane 
equal to 7?
A. a = 
B. a = 
C. a = 
D. a = 
Use scientific notation to solve the problem.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 x 105 miles per second.
A. 6.0 x 105 miles B. 6.0 x 1014 miles C. 6.0 x 107 miles D. 6.0 x 1012 miles
Change the sign. (Find the opposite, or additive inverse.) 0
A. 1
B. 
C. 0
D. -1
In order to prepare her budget, Sue gathers receipts for all major expenses she has had over the last month. Round the figure to the nearest dollar.Donations to charity, $343.17
A. $344 B. $342 C. $343 D. $343.27