Why is a circle not a polygon

The sum of two numbers is 61 and the difference is 17. what are the numbers?

My number has a tens digit that is 8 more than the ones digit. Zero is not one of my digits

If U is the set of all natural numbers less than 10, A is its subset containing all natural numbers less than 6 and B⊂U consists of all natural numbers greater than 4 (and of course smaller than 10), draw Venn diagram showing these sets.

Kendle wants to play several games of laser tag. She has $35 to play g games. Each game of lazer tag costs $5. Select the equation that matches this situation.

Que son los decimales

The regular price of a calculator is $15.40. it goes on sale for 30% off the regular price. what is the amount of savings on the calculator

If two angles are complementary and one angle is 52°, what is the measure of the other angle? 38° 52° 128° 90

How to find x and y for 4 (x+1) = 4x+2+2

What is a solution I forgot the inequality M > 13/6

Find a polar equation of the form r=f (θ) for the curve represented by the cartesian equation x=-y2.