Practice problem
Which of the following are equivalent to 45+(15+5)45+(15+5)45+(15+5)?
(45+15)+5(45+15)+5(45+15)+5
(15+5)+45(15+5)+45(15+5)+45
5×(5+45)5\times (5+45)5×(5+45)
(45+5)+15(45+5)+15(45+5)+15
Type a concept, like “slope” or “photosynthesis”.
