Solve the problem.Check whether the sequence is arithmetic. If the sequence is arithmetic, find the common difference d.2, -1, -4, -7, -10, . . .
A. arithmetic; d = -3
B. not arithmetic
Answer: A
Mathematics
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Solve the equation.(x - 5)2 = 25
A. {0, 10} B. {10} C. {0, -10} D. {-20}
Mathematics
Complete.2.25 ha = 
sq m
A. 2250 B. 225 C. 22500 D. 22.5
Mathematics
Solve the problem.A tree casts a shadow 36 m long. At the same time, the shadow cast by a 49-centimeter tall statue is 90 cm long. Find the height of the tree. Round to the nearest tenth.
A. 66.1 m B. 18.1 m C. 19.6 m D. 64.6 m
Mathematics
Without actually converting, choose the most reasonable answer.The weight of a vitamin is about __________ .
A. 200 kg B. 20 kg C. 200 g D. 2 kg
Mathematics