May somebody me with these problems; which i’ll be forever grateful for. i’ll give brainiest answer to the person who can do both! : )

a)Louisa : c - 0,15*c

New expression : 100% * c - 15% * c = 85% * c

Comparison : c - 0,15*c and 85%*c : the expressions are basically the same, except Louisa's expression is in decimal numbers, and the new expression is in percentage.

Louisa's expression is represented like substraction with decimal numbers, and the new expression is in percentage and it means the total amount directly.

b) width = w = 16 feet

lenght = l = 16 feet + 4%*16 = 16 + 0,04 * 16 = 16 * (1+0,04) = 16 * 1,04 = 16,64 feet

the area of the new room = w * l = 16 * 16,64 = 266,24 square feet

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!