7 L of one solution is mixed with 3 L of another, making a new solution with a total volume of 10 L and concentration 29%. This means the new solution contains
(10 L) * 29% = (10 L) * 0.29 = 2.9 L
of acid.
Let the concentration of the first solution be <em>c</em>%. Each liter of the 15% acid solution contributes 0.15 L, and each liter of the solution of unknown concentration contributes 0.01<em>c</em> L of acid. To end up with a total of 2.9 L of acid, we would get
7 * (0.01<em>c</em> L) + 3 * (0.15 L) = 2.9 L
Solve for <em>c</em> (we can omit the units):
0.07<em>c</em> + 0.45 = 2.9
0.07<em>c</em> = 2.45
<em>c</em> = 35
So the first solution has a concentration of 35%.
Answer:
if it is a test why are u cheating
Step-by-step explanation:
Which of the sets of ordered pairs represents a function? (5 points) A = {(1, −5), (8, −5), (8, 7), (2, 9)} B = {(7, −4), (7, −2
Brilliant_brown [7]
<h2>
Answer:None</h2>
Step-by-step explanation:
For any function,any point in the domain has a unique image in the codomain.
For set 
:
from the point 
from the point 
For a same point 
,there are two images.
So, does not represent a function.
For set 
:
from the point 
from the point 
For a same point 
,there are two images.
So, does not represent a function.
Okay so. im not good at explaining. but ill try my best
you go with your basic X over Y soooo 2X you would go up 2 because its a positive number. and to the.. left 3 becuse it - if it was a + you would go to the right 3 but sense its -3y you go to the left
so fare your going to go from the -9 point on your graph up 2 over 3
and if its just Y ots over 1
i really hope this makes sence and helps
Answer:
124.4
Step-by-step explanation:
Perimeter of ∆HIJ = IJ + HJ + HI
IJ = 40
HJ = 37.6
HI = ?
Let's find HI
∆HIJ and ∆EFG are similar. Since they have equal corresponding angles. Therefore, the ratio of their corresponding sides would be equal.
Thus:
EF/HI = FG/IJ
EF = 117 (given)
HI = ?
FG = 100 (given)
IJ = 40 (given)
Plug in the values
117/HI = 100/40
117/HI = 2.5
117 = HI*2.5
117/2.5 = HI
HI = 46.8
✔️Perimeter of ∆HIJ = IJ + HJ + HI
= 40 + 37.6 + 46.8
= 124.4
