Solve the inequality and graph the solution set.| x | ? 7
A. (-?, 7]
B. (-?, -7] ? [7, ?)
C. (-?, -7]
D. [-7, 7]
Answer: D
Mathematics
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For the given rectangular equation, write an equivalent polar equation.xy = 1
A. 2r sin ? cos ? = 1 B. r sin 2? = 2 C. 2r2sin ? cos ? = 1 D. r2sin 2? = 2
Mathematics
Express the interval in set builder notation and graph the interval on a number line.(-?, 4.5)
A. {
x ? 4.5}
B. {
x ? 4.5}
C. {
x > 4.5}
D. {
x < 4.5}
Mathematics
Find the products AB and BA to determine whether B is the multiplicative inverse of A.A = 
,B = 
A. B = A-1 B. B ? A-1
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Find the value of the expression.|-4| + |6| - |-9|
A. 11 B. 19 C. -7 D. 1
Mathematics