PLEASE HELP
Which of the following is a system of linear equations in two variables?

A. 2x – 7y = 8
B. x + 9y = 2 ; 2x – 3y > 12
C. 4x + 1 = 8
D. 3x + 5y = -2 ; x – 4y = 9

Find the value of x for which the lines are parallel.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.