This is my first time posting here but im sure it wont be the last :P
Anyways im in my first math class in about 2-3 years and i have done this stuff before but i cant remember very much. These 3 in particular have got me stumped and im not even sure what you would call this in order to look it up.
Im not sure how to type the other two without it looking like gibberish so here is a picture of it. i hope this is legible, any help would be much appreciated.
Im not even sure where to start with these...