In some division problems, a number or pattern of number that continues indefinitely is a?

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Acircle has a circumference of 28.36 units what is the diameter of the circle