Perform the indicated operation. Write in lowest terms.13 - (-20) + 9 + (-19)
A. 23
B. -5
C. -21
D. 21
Answer: A
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Solve the problem.You have 68 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river, find the length and width of the plot that will maximize the area.
A. length: 34 ft, width: 34 ft B. length: 17 ft, width: 17 ft C. length: 51 ft, width: 17 ft D. length: 34 ft, width: 17 ft
Find the probability.When a pair of dice is rolled there are 36 different possible outcomes: 1-1, 1-2, ... 6-6. If a pair of dice is rolled 4 times, what is the probability of getting a sum of 5 every time?
A. 
B. 
C. 
D. 
Use ?, ?, ?, or both ? and ? to make a true statement.{s, r, t} 
{s, r, t}
A. ? and ? B. ? C. ? D. ?
Use the distributive property to rewrite the algebraic expression without parentheses. Then simplify the result, if possible.12(6z + 5) - 2
A. 72z + 36 B. 18z + 15 C. 72z + 3 D. 72z + 58