Answer:

Explanation:
If a side has a bracket [] then it is less than or equal to, meaning that it can reach that exact number.
However, if a side has a parentheses () then it is simply less than. It cannot be that exact number, but it can be even slightly less than that number.
Answer:
11 is the answer
Step-by-step explanation: i hope so cuz my calculations gives this answer
Mixing the two concentrations would give a new concentration which is in between 50 - 60% .
D. 63% cannot be obtained
3x+2y=22
3x-2y=2
we add these to equations together
6x=24
x=4
then we plug in x to find y
3*4+2y=22
12+2y=22
2y=10
y=5
solution is (4,5) (x=4 and y=5)