There are 13 students in a biology class and 12 students in a chemistry class. if there are 20 students in total, how many students are in both classes?

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.