The cross section of a drain is a trapezoid, as shown in the figure. The sides and the bottom of the trapezoid are each ?a = 9 ft long. Determine the angle 
so that the drain will have a maximal cross-sectional area.
?
?
__________°
Fill in the blank(s) with the appropriate word(s).
60
Mathematics
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Graph the function.f(x) = 
x
A. 
B. 
C. 
D. 
Mathematics
Find an equation for the line, in the indicated form, with the given properties. Containing the points (-7, 6) and (-4, 8); slope-intercept form
A. y - 6 = 
(x + 7)
B. y = mx + 
C. y = - 
x + 
D. y = 
x + 
Mathematics
Add.9900 square meters + 400 square meters + 77 square meters
A. 1207 square meters B. 10,377 square meters C. 1467 square meters D. 10,017 square meters
Mathematics
Find approximate x-intercepts. Round the coordinates to the nearest tenth if necessary.y = 2x2 + 5x + 3
A. (-3, 0), (0.5, 0) B. (-1, 0), (1.5, 0) C. (-3, 0), (-0.5, 0) D. (-1, 0), (-1.5, 0)
Mathematics