Answer the question as instructed.Which of the following is not a mathematical sentence?
A. 4 ? 11
B. 4 ? 7 = 28
C. 4 ? 7 ? 28
D. 4 < 7
Answer: C
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A. 175 B. 177 C. 176 D. 166
Write a proportion that can be used to solve the problem. Then solve the equation to obtain the answer.It is recommended that there be at least 17 square feet of work space for every person in a conference room. A certain conference room is 16 feet by 12 feet. Find the maximum number of people the room can accommodate.
A. 11 people B. 21 people C. 12 people D. 31 people
Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
C. x = 9; y = 2
D. x = 2; y = 
Perform the indicated operations and simplify the result. Leave the answer in factored form.
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A. 
B. 
C. 
D. 