Consider the following pair of equations:
y = x + 4
y = –2x – 2
explain how you will solve the pair of equations by substitution. show all the steps and write the solution in (x, y) form.

An animal shelter has 21 puppies. if the puppies are 28% of the total dogs and cat population how many dogs and cats are in the animal shelter

What is the upper quartile in the box plot?

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?