Question

Hevesh makes 3 lines of dominoes that are each 18 inches long. Two lines have dominoes spaced 1 and 1/2 in. apart, and the third line has dominoes spaced 3/5 in. apart from front edge to front edge. How many total dominoes will she need for all 3 lines?

Answer 1

what does that mean? 1 1 2?

Answer 2

uhhh

Answer 3

idk my teacher is like here extra credit do it i think it means 1 1/2

Answer 4

maybe

Answer 5

so this is what you do

Answer 6

you have a line that is 18 inches long, and the distance between the dominoes for 2 of them is 1 1/2 (if thats what it says) take 18 and divide by 1 1/2 to get how many you need. Since there are 2 lines, you need to multiply that number by 2. For the last line take 18 and divide by 3/5 for the same reason as the first 2 lines. Add that number to the numbers of the first 2 lines to find how many dominoes you need

Answer 7

uhhh hehe can you like draw that out

Answer 8

okay

Answer 9

simple terms. 18/( 1 1/2) = 18/(3/2) for lines one and 2
18/(3/5) for line 3.
Add up the totals

Answer 10

add up what totals

Answer 11

so did you do what I told you up there?

Answer 12

and do you understand why?

Answer 13

no i dont understand any of it

Answer 14

so lets look at the first line okay

Answer 15

we have a line that is 18 inches long, and each domino takes up 3/2 inches (which is 1 1/2 rewritten). So we can do 18/(3/2) to find out how many dominoes he needs for that line. Use this method to do it for the other lines and then add them up

Answer 16

i dont get it at all

Answer 17

ill figure it out on my own thanks for the help tho appreciate it : )