Which shows equivalent expressions? a squared + 3 b minus 2 a squared = 3 a squared + 3 b minus 4 a squared
a squared + 3 b minus 2 a squared = 3 a squared + 4 b minus 4 a squared
Negative a squared + 3 b minus 2 a squared = 3 a squared + 3 b
Negative a squared + 3 b + 2 a squared = 3 a squared + 4 b minus 2 a squared

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

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?

X+ y = 5 ; x - y =3 solve using linear combination