I need some help ? Does anyone know this:)I’m new too this thats why im asking loll

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.