. Which of the following correctly shows the re-grouping for 36 x 23?
30 x 20; 6 x 20; 30 x 6; 6 x 3
30 x 20; 6 x 20; 30 x 3; 6 x 3
30 x 23; 6 x 20; 30 x 3; 6 x 3
30 x 20; 6 x 23; 30 x 3; 6 x 3

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

Write the pair of fractions as a pair of fractions with a common denominator

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?