There are two books and one art pallet that equals $45.00 if there are four books and one art pallet that equals $85.00, how much is one book

This is fractions casey shared a pizza with some friends. they each ate 1 third of the pizza. how many people shared the pizza

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Can someone me with this problem i don't understand i need