The quick way to do this is to multiply the bill by 1, mult. it again by 0.18, and then add the two results together.
Better and faster: Mult. the bill amount ($42.75) by 1.18:
1.18($42.75) = $50.45 (answer)
Answer:
Add and subtract the second term to the expression and factor by grouping .
(x-1)(x+1)(x-3)(x+2)
S x 10. S stands for the packages of sponges, and 10 stands for the number of sponges in each package. I hope this helps!