Select all ratios that are in their simplest form. A 9:7 B 14:3 C 12:21 D 30:29 E 28:30

7friends share 4 pizzas equally how much pizza did each friend get

Select the two pairs of figures that are similar.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.