Let a = {1, 2, 3, 4}, b = {3, 4, 5, 6}, and c = {5, 6, 7, 8}. find each of the following sets. (enter your answers in set-roster notation.) (a) a δ b (b) b δ c (c) a δ c (d) (a δ b) δ c

C.  D ⊆ C

Step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!