Find the opposite of the integer.-21
A. -1
B. 0
C. -21
D. 21
Answer: D
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Evaluate the expression.54 ÷ (-3)
A. 18
B. - 
C. -28
D. -18
Translate the sentence into an equation using the variable x and solve the equation.Twice a number plus 4 is 12.
A. x + 4 = 12; x = 8 B. 2 + x + 4 = 12; x = 6 C. 2x + 4 = 12; x = 4 D. 2(x + 4) = 12; x = 2
Solve the problem.A new exhibit is scheduled to open at the local museum. Museum officials expect that 8000 people will visit the exhibit in its first week, and that the number of visitors will drop by 10 people per week after the first week during the first 6 months. Find the total number of visitors expected in the exhibit's first 7 weeks.
A. 47,850 visitors B. 55,790 visitors C. 39,850 visitors D. 55,730 visitors
Solve the system by addition. 3x - 6y = 54 6x = 52 + 12y
A. {(-7, -5)} B. {(4, -5)} C. ? D. {(4, -7)}