There are 15 animals in the barn. some are geese and some are oxen. there are 56 legs in all. how many of each animal are there

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

How to use order of operation in 20 divide by 4 multiply 5 = 1