Choology COURSES
Unit 3A Study guide
POSSIBLE POINTS: 2
x Clear
Undo
Redo
Mrs. Ratty's living room is 10 feet long and 8 feet wide. She wants to put a
rectangular rug in the living room that is 4 feet by 5 feet. How much floor space
will still be left in her living room after she adds the rug? Draw a model to show
your thinking.

Factor this polynomial completely x^2-64

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?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)