Answer:
2tk^3
Step-by-step explanation:
Let us assume that x kg of 30% salt solution is mixed with (200-x) kg of 40% salt solution in order to obtain 200 kg of 37% salt solution.
We can set up a linear equation in terms of x by setting amount of total salt before mixing and after mixing equal to each other.

Therefore, 60 kg of 30% salt solution should be mixed with 140 kg of 40% solution.
Answer:
77
Step-by-step explanation:
20-(+20)-(-65)-(-12)
-(-65)-(-12)
+65-(-12)
+65+12
77
Answer:
True
Step-by-step explanation:
We know that
,
in Quadrant III, and
in Quadrant III. Thus, x is indeed negative since
.