Acatering company needs to know how much roast beef to slice for sandwiches for an event. they are making 30 club sandwich, which requires 1/8lb of roast beef each. they are also making 20 french dip sandwiches, which require 1/5lb each. how many pounds of roast beef should they slice in total?

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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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