There are 100 children in a school. 20 of them have kittens, 45 have puppies, 30 have ponies and 18 of them have unicorns. None of the students have more than two pets. The only students who have two pets have a puppy and a kitten. How many of the students have two pets?

What are the domain and range of the function f(x)=2^x+1

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.

Betty correctly answers 30 questions on your math test there are 40 questions on the test what percent of the questions did she answered incorrectly