What is 3.8 repeating as a fraction

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?

22 points algebra 1//sum and product of rational and irrational numbers. dont have to do all 4 if could much : )) write an example: 1) how the product of two identical irrational numbers can be a rational number. 2) how the product of two different irrational numbers can be a rational number. 3) write a quotient of intergers that is not a real number. 4) is the set of positive irrational numbers closed for the operation of division? if not give a counter example.