Miles bought three books that cost $13.89, $6.70, and $3.05. What is the total amount Miles spent on the books? A.
$22.54

B.
$22.64

C.
$23.54

D.
$23.64

D

Step-by-step explanation:

it would be D because 13.89+6.70+3.05 would equal to 23.64

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!