Find the first term and the common ratio of the geometric sequence.2, -8, 32, -128, 512, . . .
A. a1 = 2, r = -4
B. a1 = -4, r = 4
C. a1 = -4, r = 8
D. a1 = 2, r = - 
Answer: A
Mathematics
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Convert the angle to decimal degree notation. Round your answer to two decimal places.72°34'
A. 72.64° B. 72.58° C. 72.54° D. 72.59°
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Use the properties of angle measures to find the measure of each marked angle.
a = (x + 18)°b = (x + 118)°
A. 79°, 79°, 22° B. 11°, 22°, 147° C. 22°, 29°, 129° D. 11°, 22°, 57°
Mathematics
Solve the equation (x in radians and ? in degrees) for all exact solutions where appropriate. Round approximate answers in radians to four decimal places and approximate answers in degrees to the nearest tenth.4 sin2 x - 1 = 0
A. 
B. 
C. 
D. 
Mathematics
Find the product and simplify.
? 
A. 
B. 
C. 
D. 12z
Mathematics