6r 2- 4r - 16 Show your work. You can use grouping or an area model. Remember to be on the lookout for special cases. If you know you are looking at a special case, you can use a shortcut.

the equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5

the 3rd on is correct

step-by-step explanation: