There are 7 entrances and 6 exits in the labyrinth. In how many ways can it be passed if there are two routes between each entrance and each exit?
a. 84
b. 42
c. 168
d. 26
a. 84
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The associative and commutative properties for addition allow for three or more integers to be added in any order. Find the given sum.3 + (-2) + (-13) + 9
A. 27 B. 5 C. -21 D. -3
Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.Find cos A when a = 
and c = 13.
A. 
B. 
C. 
D. 
Write the equation that results in the desired transformation.The squaring function, vertically stretched by a factor of 5 and reflected across the x-axis
A. y = -5x2 B. y = 5x2 C. y = 5(x - 5)x2 D. y = (x - 5)2
Find the exact value of the expression using the provided information.Find cos(A + B) given that cos A = - 
, with A in quadrant III, and 
with B in 
A. 
B. 
C. 
D. 