2y + 12 = -3x

solve pls i have more I WILL GIVE EXTRA POINTS
20+

Valentino starts with a population of 1,500 amoebas that increases 35% in size every hour for a number of hours, h. the expression 1,500(1+0.35)h finds the number of amoebas after h hours. which statement about this expression is true? a. it is the initial population raised to the growth factor after h hours. b. it is the sum of the initial population and the percent increase. c. it is the sum of the initial population and the growth factor after h hours. d. it is the product of the initial population and the growth factor after h hours.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Which expression gives you the distance between the points (5,1)and(9,-6)