How to simplify (3x^2+x-8)+(7-2x+3x^2)

1. what is the phythaforean theorem? 2.what do we use it for? 1.what is the distance formula ? 2.what do we use it for?

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?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels