If a humming bird were to get all of its food from a feeder then a 16 oz nectar feeder could feed about 80 humming birds a day how many humming birds would you expect to be able to feed with a 12 oz feeder?

60 is the answer because 16 goes into 80 5 times, so 5 hummingbirds can drink 1 oz so if you have a 12 oz feeder then you can feed 60 birds or 5x12.

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.