Answer:
1 : 4
Step-by-step explanation:
Let x represent the amount of 30% solution for 1 unit of 5% solution. Then the amount of acid in the mix is ...
0.30x + 0.05·1 = 0.10·(x +1)
0.30x + 0.05 = 0.10x + 0.10 . . . . eliminate parentheses
0.20x = 0.05 . . . . . . . . . . . . . . . . subtract 0.05+0.10x
x = 0.05/0.20 = 1/4
That is, the ratio x : 1 is 1 : 4.
Answer:
0
Step-by-step explanation:
Let's find f(3) first
All we need to do is plug 3 in the place of x
2(3) - 3
6 - 3 = 3
Now let's find f(0)
Do the same thing for the first one, plug the new number in the place of x
2(0) - 3 = -3
Not add both answers up
3 + -3 = 0
The answer is four because 2 x 0 is 0 and then 12 divided by 3 is for
THE ANSWER IS 4
The correct answer is A.
You have direct variation if x and y are modeled by the equation
In this case, m is the constant of proportionality. So, if the constant has to be 2, the equation becomes
A side note: Actually, option C has a constant of proportionality of two as well, except the roles of x and y are interchanged. I chose option A because usually you want the y = mx form, but the names of the variables are obviously meaningless.
C the bank will exchange his new car for a old one
