Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m
B. 21 + m
C. 21 + 7m
D. 21 + 3m
Answer: D
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Find the volume of the indicated region.the region in the first octant bounded by the coordinate planes and the surface 
A. 
B. 
C. 
D. 
The scores on a 30-point multiple-choice exam are given in the following frequency table:
The locator for the 80th percentile is
A. 22.5. B. 23. C. 22.2. D. 22.4. E. none of these
Find the transverse axis, vertices, and foci of the hyperbola.
- 
= 1
A. transverse axis is x-axis
vertices at (-10, 0) and (10, 0)
foci at (- 2
, 0) and (2
, 0)
B. transverse axis is x-axis
vertices at (-8, 0) and (8, 0)
foci at (-10, 0) and (10, 0)
C. transverse axis is y-axis
vertices at (0, -8) and (0, 8)
foci at (0, - 2
) and (0, 2
)
D. transverse axis is x-axis
vertices at (-8, 0) and (8, 0)
foci at (- 2
, 0) and (2
, 0)
Provide an appropriate response.A student argued that it is impossible to use the substitution method to determine if a system of equations has no solution or an infinite number of solutions. Is the student correct?
Fill in the blank(s) with the appropriate word(s).