Evaluate the expression.11 - (12 - 20)
A. 43
B. 3
C. 19
D. -21
Answer: C
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Determine the value of the trigonometric function of ? using the given information.If sin ? = - 
and tan ? = 
, then determine the value of cos ?.
A. 
B. 
C. - 
D. - 
Write the following proportions.3 acres is to 4.31 acres as 4.5 acres is to 6.465 acres.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Use the discriminant to find what type of solutions (two rational, two irrational, one rational, or two nonreal complex) each of the following equations has. Do not solve the equation.1 - 2x2 = -3x - 2
A. one rational solution B. two rational solutions C. two irrational solutions D. two nonreal complex solutions