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Algebra_3

Chapter 68

Problem 3

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Brand-X pain killer helped percent of those who were tested with it.
If people in the test experienced pain relief from the test,
How many people (P) were tested with Brand-X pain killer?
Note: Round off to zero decimal points (people are not counted in parts).
Use a diagram to solve the problem.
This statement can be written in shorthand form as:

click refresh (F5)

The total number people in the test P = people


Example:

Suppose you have a box of 80 marbles. (see figure below)



50 percent more marbles are added to the box. How many marbles are now in the box.

Solution: 50 percent is written as click refresh (F5)

and thus 50 percent more marbles added gives: click refresh (F5) marbles

Try this solution by entering (1 + 50/100)80 into the Graphing Calculator in the Function f(x) = box .
Click on the Plot Graph button.
The answer will appear below the Function f(x)=box as f(x) = 120