Which of these systems of equations has no solution? 3x + 2y = -12 and 2x + 3y = -12
2x + 3y = 12 and 2x - 3y = 12
-3x + 3y = 13 and 2x -2y = -12
-3x - 2y = 12 and 3x + 2y = -12
Mateo chose C as the correct answer. How might he have gotten that answer?
(I just need help on the last part, not the system of equations having no solution.)

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

The surface area of the triangular prism is .

Find the maximum value of p= 4x + 5y subject to the following constraints :