The 4015n printer that is used in most of the labs has a toner cartridge that cost 40.00 and each cartridge should print 10,000 pages, a ream of 500 pages for the printer costs 6.00. Just including those costs how much does it cost to print a single page

Add the fractions and simplify 1/2+ 1/3

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55