Add or subtract as indicated.(11x9 + 3x7 - 3x3 + 4) - (3x9 - 6x4 + 10x3 - 3)
A. -8x9 + 3x7 + 6x4 - 13x3 + 7
B. -8x9 + 3x7 - 6x4 - 13x3 + 7
C. 8x9 + 3x7 - 6x4 - 13x3 + 7
D. 8x9 + 3x7 + 6x4 - 13x3 + 7
Answer: D
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Solve the problem.Mark Jakob lives in Tulsa, Oklahoma and plans to attend graduate school to earn his Ph.D. in chemistry. He wants to visit chemistry departments at schools in the following cities: Berkeley, California; Madison, Wisconsin, and Chicago, Illinois. The costs of the one-way flights between these four cities are as follows: Tulsa to Berkeley costs $604; Tulsa to Madison costs $510; Tulsa to Chicago costs $490; Berkeley to Madison costs $817; Berkeley to Chicago costs $699; Chicago to Madison costs $95. What is the minimum cost Mark can pay to visit all the schools and return to Tulsa?
A. $2006 B. $2516 C. $1210 D. $1908
Simplify the expression. Assume all variables represent positive real numbers.
A. 9xy 
B. 9xy2 
C. 3x2y2 
D. 9xy 
Divide to find the exact answer. Express the answer as a whole or mixed number when possible and simplify.1
÷ 
A. 7
B. 8
C. 6
D. 9
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. What are Mr. Cameron's expected concert earning?
A. $300,000 B. $360,000 C. $60,000 D. $218,400