Final answer:
To find the number of apples Ms. Perkins picked with two stems, set up a system of equations and solve for the variables.
Step-by-step explanation:
To find the number of apples Ms. Perkins picked with two stems, we need to set up a system of equations. Let's say she picked x apples with none stem and y apples with two stems. We can set up the following equations:
x + y = 81 (total amount of apples picked)
For every 5 apples she picked with none stem, she picked 4 apples with two stems, so we can write:
x/5 = y/4
From the second equation, we can rewrite it as:
4x = 5y
Now we have a system of equations:
x + y = 81
4x = 5y
We can solve this system of equations by substitution or elimination method.
Once we find the values of x and y, we can determine the number of apples Ms. Perkins picked with two stems.