Henry sells rings for $8 each. his expenses are $1.50 per ring, plus $91 for supplies. how many rings does he need to sell for his revenue to equal his expenses?

14 rings.

Step-by-step explanation:

in order to calculate how many rings does he have to sell to break even we first have to calculate the profit that he has on the sell of every ring from which he can take money to pay per supplies, so that would be the selling price minues expenses:

8-1.5=6.5

Now we have to divide the 91 in supplies by the profit:

91/6.5=14

So he has to sell 14 rings in order to break even between expenses and supplies.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

so, converting firstly the mixed fractions to improper fractions and then "adding".