What is the correct answer for this?

You put the following items into your rucksack. ham 600 g cheese 380 g tomatoes 270 g how much do all the ingredients weigh in total?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value