“Give the perimeter for each figure as a simplified expression”

How do you answer this question? (step by step)

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?