What is the greatest common factor of 18,9, and 45,

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?