Can someone please explain?

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

The area of a circle is equal to 1 dm². find the radius of the circle.