What does cluster mean

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Through non-collinear points there is exactly one plane.

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total