Can somebody help me out here

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25