Which ratio is the odd one out?
1:5 9:46
4:20
6:30
3:15

9:46

Step-by-step explanation:

1:5

4:20 => 1:5 (divide both by 4)

6:30 => 1:5 (divide both by 6)

3:15 => 1:5 (divide both by 3)

9:46 (cannot be simplified further)

the answer is 15% decrease

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!