(18 points! )decide whether the relation is a function. if it is a function, give the domain and the range

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13

Luis has a cooler filled with cans of soda. for every 5 cans of coke there are 3 cans of sprite. if there are 25 cans of coke, how mant cans of sprite are there?