9-20 convert each unit of capacity

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

Explain how you can use the associative property to evaluate (7x50)x4.

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.