A farmer paid $500 per month for deliveries over 10 months. For the other 2 months of the year, he paid $600 per month. Which numerical expression can be used to find the total the farmer paid for deliveries this year?

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.