Answer:
$20
Step-by-step explanation:
We are given the percentages of how much she spent on each purchase but we need the percentage of what is left after each purchase. We calculate this by subtracting each percentage from 100% like so.
100% - 40% = 60%
100% - 20% = 80%
100% - 50% = 50%
Next we need to do is change the percentages into decimal format. We do this by moving the decimal 2 digits to the left. Therefore the percentages wasted are the following
60.0% ⇔ 0.60
80.0% ⇔ 0.80
50.0% ⇔ 0.50
Now that we have the percentages in decimal format we can calculate the total price (t) by retracing the spending process. The spending process was following.



So we have to retrace by solving for
, then
, and finally (t)
... divide both sides by 0.50

.... divide both sides by 0.20

.... divide both sides by 0.60
Finally we can see that the Total amount of money that Alice had before lunch was $20
The answer is 2.5 because the point is at the middle. Hope this’ll help
In mathematics it’s another term for isometry
Simple...
you have:

To make this into an improper fraction-->>
1.) Multiply whole number by denominator
2.)Add the number you got plus the numerator
3.) Use the original denominator to finish your improper fraction
Example:

4*9=36
36+4=40

Thus, your answer.
X= 270
simplify the equation using cross multiplication