Atank contains 100 kg of salt and 2000 l of water. pure water enters a tank at the rate 12 l/min. the solution is mixed and drains from the tank at the rate 6 l/min. (a) what is the amount of salt in the tank initially? amount = (kg) (b) find the amount of salt in the tank after 1.5 hours. amount = (kg) (c) find the concentration of salt in the solution in the tank as time approaches infinity. (assume your tank is large enough to hold all the solution.) concentration = (kg/l)

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

in mathematics, a constraint is a condition of an optimization problem that the solution must satisfy. there are several types of constraints—primarily equality constraints, inequality constraints, and integer constraints. the set of candidate solutions that satisfy all constraints is called the feasible set.

hoped i'm right lol

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

its line 2 i just added the rest or else it wouldn't let me answer