Solve.The sum of 3, 6, and a number amounts to 15. Find the number.
A. 12
B. 24
C. 18
D. 6
Answer: D
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Write an algebraic equation and use it to solve the problem.In 1999, City A experienced 15 armed robberies less than twice that of City B. In the two cities combined, 243 armed robberies occurred. How many armed robberies occurred in City A and in City B?
A. City A: 71 armed robberies; City B: 172 armed robberies B. City A: 157 armed robberies; City B: 86 armed robberies C. City A: 114 armed robberies; City B: 129 armed robberies D. City A: 137 armed robberies; City B: 76 armed robberies
Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.B = 63°30'a = 12.2 ftc = 7.8 ft
A. b = 12.2 ft, A = 75°07', C = 41°23' B. No triangle satisfies the given conditions. C. b = 11.2 ft, A = 77°49', C = 38°41' D. b = 13.2 ft, A = 73°07', C = 37°23'
Solve the problem.The space in a landfill decreases with time as given by the function 
where t is measured in years. How much space is left when t = 1?
A. 210 B. 110 C. 380 D. 200
Divide.25 ÷ 0.05
A. 500 B. 0.5 C. 5 D. 50