Answer:
18.19.
First you have to subtract 15 from 100, giving you 85%. You then multiple 85% to the $20, giving you $17. You then add the 7 to 100, giving you 1.07%, then you multiple that to the $17 and you end up with $18.19.
I believe the answer would be 99
plug in the variables and solve to answer this question.
To help with thinking about this, we can say that the 6 gallons of 50% acid contains 3 gallons of pure acid and 3 gallons of filler. This would make the concentration 3/6, or 50%. Adding a gallon of pure acid would shift the concentration to 4/7, or 57.1%.
When the relationship becomes 70%, four gallons of pure acid have been added.
3+4 7
—— = — = 70%
6+4 10
The answer would be 100 because if you say it as a decimal you hear hundreths
Answer:
Please check the explanation.
Step-by-step explanation:
If the ratio y/x is the same for all related pairs of x and y, it means it represents a proportional relationship.
In other words, '
' varies proportionally with '
' or that '
' is directly proportional to '
'.
When we say the ratio is the same, it means when '
' increases, '
' increases and as '
' decreases, '
' decreases
Using the equation
y ∝ x
y = kx
k = y/x
Where 'k' is the proportionality constant.