Solve for d. ad - bc = f

What is the maximum for f (x) = 625-16x^2

For his phone service, Jim pays 9 monthly fee of $10 and he pays a additional $0.04 per minute of use. The least he has been charged in a month is $59.56.

calra bought a crate of red and green apples for her bakery. the crate had 140 red apples, which were 70% of the apples in the crate. how many apples in were in the crate

Ann is planning a trip to Australia. The table below shows the cities she hopes to visit while she is there, as well as the amount of money she estimates that she will spend in each place as a result of lodging, eating, transport, and similar

I collected $0.05 at the recycling plant for each of her 78 cans how much money did she collect all together