Find those values of x for which the given function is increasing and those values of x for which it is decreasing.y = 6x2 + 4x
A. Increasing for x > 
, decreasing for x < 
B. Increasing for x > - 
, decreasing for x < - 
C. Increasing for x > - 
, decreasing for x < - 
D. Increasing for x < - 
, decreasing for x > - 
Answer: C
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The triangles shown in the illustration are congruent. The sides of the triangles are 
, 
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.
So 
.
Answer the following statement true (T) or false (F)
Identify all of the symmetries in the following figure.
A. It has reflection symmetries; it can be reflected across a vertical line through its center, a horizontal line through its center, or either of its diagonals, and its appearance remains the same. B. It has translation symmetry (if imagined to extend in both directions). It also has reflection symmetry (across a horizontal line between the jagged lines). C. It has rotation symmetry; it can be rotated through 180° and its appearance remains the same. It also has translation symmetry (if imagined to extend in both directions). D. None of these.
Solve the problem.A plumber charges a fixed rate plus an hourly rate to do house calls. The ordered pair (2, 65) indicates total charges of $65 for a job taking 
and the ordered pair 
indicates total charges of $170 for a job taking 9 hours.a) Write a linear equation giving the total charges, y, in terms of the number of hours x.b) Use the equation found in part a to find how much it costs for 4 hours.c) How many hours would result in a total charge of $125?
A. y = 15x + 35; $95; 6 hours B. y = 15x; $60; 6 hours C. y = 15x + 35; $95; 8 hours D. y = 15x + 35; $60; 6 hours
Solve, rewrite in interval notation, and graph.5x - 8 ? -13 and 5x - 8 ? 7
A. (-1, 3)
B. [-1, 3)
C. (-1, 3]
D. [-1, 3]
