Answer:
y - 27 = 0 (x - 21) or y = 27
Step-by-step explanation:
Answer:

Step-by-step explanation:









Answer:
15.1 to nearest tenth.
Step-by-step explanation:
The 7 is the lowest number so the mean would increase if taken away.
New mean = (8 + 12 + 13 + 15 + 18 + 19+21) / 7
= 106 / 7
= 15.14
notice the first term is -10, and the common difference is 3, so we add 3 to get the next term.

check the picture below.