20/8.240 what’s the answer to this problem show step

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is

What is the value of x when x + 7 = 21?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?