Annabelle spent $5 to buy 4 raffle tickets. how many tickets can she buy for $20

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2