Answer:
15.
16. 10 ml of 20% saline and 40 ml of 10% saline
Step-by-step explanation:
A chemist takes x ml of 20% saline and y ml of 10% saline. In total, he takes
x + y ml that is 50 ml, so
There are 
ml of salt in x ml of 20% saline and 
ml of salt in 10% saline. There are 
ml of salt in 50 ml of 12% saline. Thus,
15. We get the system of two equations:
16. Solve this system. From the first equation:
Substitute it into the second equation:
Answer:
2240
Step-by-step explanation:
I think you find 3% of 2000 which is 60
Then you multiply that by 4 which is 240
Add it to the 2000
and get 2240
Add up the 84 and 42 to get 126, then divide by 6 to get the number of tables which is 21. And the number of seats is 126 because you would need a seat for every person. Hope this helps.
Answer:
g + 15 = 40
or
40 - 15 = g
Step-by-step explanation:
Yes it can actually. If you take 1/2 and 1/2 for example, their product is 1/4.
