Write the first ten terms of a sequence whose first term is -10 and whose common difference is -2.

what’s the question?

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)