Perform the indicated operation and write the answer in lowest terms. 
÷ 
? 
A. 
B. 
C. 
D. 
Answer: A
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Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(1, 7)} B. no solution; ? C. {(-8, 0)} D. {(0, 8)}
During testing of a certain brand of air purifier, the amount of smoke remaining t min after the start of the test was 
percent of the original amount. Compute 
. Round the answers to the
nearest thousandth.
?
__________% per minute
?
__________% per minute in the second power
What will be an ideal response?
Explain why the indicated triangles are congruent.L is the midpoint of 
. ?LKO ? ?LMN. 
? 
. Explain why ?LKO ? ?LMN.
What will be an ideal response?
Solve. Round to the nearest tenth when necessary.Glenn and Sarah are building a new home. On the blueprints, the basement measures 4 inches by 10 inches. The actual room is similar in shape with a length of 39 feet. What will the width of the basement be?
A. 97.5 ft B. 0.2 ft C. 15.6 ft D. 1 ft