PLS HELP ME ASAP PLS AND TY

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.