Add or subtract as indicated. Express the answer as a single polynomial in standard form.(6x5 - 12x3 - 8) - (8x3 + 3x5 - 2)
A. 3x5 - 9x3 - 10
B. 3x5 - 20x3 - 6
C. 3x5 - 20x3 - 10
D. -23x8
Answer: B
Mathematics
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Simplify the expression. Assume that all variables are positive when they appear.(
+ 
)(
- 
)
A. 8 - z
B. 8 - 2
C. 8 - 2
D. 8z
Mathematics
Determine whether (f ? g)(x) = x and whether (g ? f)(x) = x.f(x) = x2 + 3 , g(x) = 
- 3
A. No, yes B. No, no C. Yes, yes D. Yes, no
Mathematics
Use the vertical line test to determine if the graph is a function.
A. Yes B. No
Mathematics
A pipe has a 4.05-in. outside diameter and a 3.8-in. inside diameter. (See the illustration.) Find the area of its cross section. Use the rules for working with measurements.
A. The area is 0.785 in 2. B. The area is 3.08 in 2. C. The area is 0.771 in 2. D. The area is 6.17 in 2. E. The area is 1.54 in 2.
Mathematics