I am not sure about the last two phrases, but here's what I think.
2(n+18)
18(2+n)
We begin with 100 mL of the 2% saline solution, and will add x mL of the 0.5% saline solution. The total volume of the mixture will be (100 + x) mL. The total mass of salt will be:
(100)(2%) + (x)(0.5%) = 2 + 0.005x
This would have to be 0.79% of the total volume:
(100+x)(0.79%) = 0.79 + 0.0079x
Equating:
x = 417.24 mL
Answer:
A
Step-by-step explanation:
There is four graphs that are given to you and you must identify which one is logical. For you I'll explain how this works. Suppose you rented a bus but you went by yourself so that means you'll have to pay the full 400. However, if you have a buddy then you'll have to pay 200 while your buddy pays the other 200.
Basically 400/x
x=the amount of people going on the trip.
The reason why it's not C since you'll notice that the 3rd dot nearest to the left is 200 which 200 times 3 doesn't equal up to 800.
This is false because 2(7)+0.8/0.2=56 and 22* -4 is equal to -88 and -88 is not equal to 56
