In 2015, the population of the United States was about 320 million people. Females make up about 51% of the total population of the United States. About how many males live here? 163 million 145 million 157 million 173 million hi I need help fast please​

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!

table 3 represents a direct variation function. : )

step-by-step explanation:

gym b charges $1.05 less per hour than gym a.