Prove the following identities:

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account