Hector just bought a new laptop for $780. He earned the $780 by selling lemonade, mowing lawns, and
returning tin cans. He earned 40% of the money he used to buy the laptop from lemonade sales, and $180
from the tin cans. How much money did he make mowing lawns?

Step-by-step explanation:

40% of 780 = 312.

780- (312+180)

= 288

is only a line? i think so

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!