Rafael has a friend Emma who is standing 30 feet away from him. how far from the wall were the mirror is should Emma stand so she can see the light

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?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

2.5 milligrams is equivalent to how many grams