#1 Solve
for a .
#2 Solve the inequality and graph the solutions. Then write the solutions as a compound inequality. | x − 6| − 10 < 1
#3 Find the 21st term of the arithmetic sequence. a 1 = 8.5, d = 3.5
#4 Use the distance formula to find the distance, to the nearest tenth, from D (4, −3) to E (−1, 5).
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