Andy used a scale of Inch - 2 feet for a drawing of his house. On the drawing, a rectangular room measures 3 inches by 2 inches. Andy wants to purchase new carpet for the room that costs $4.89 per square foot. Before sales tax, how much will the new carpet cost?

$ 117.36

Step-by-step explanation:

On the drawing, the rectangular room measures 3 inches by 2 inches, we can convert to feet (using a scale of Inch - 2 feet )

(3 inches ×2) by (2 inches ×2)

= 6 feet by 4 feet

The Area of the room can now be calculated as

Area=( 6 feet × 4 feet)

= 24 ft^2

how much will the new carpet cost?

we know that the carpet costs $4.89 per square foot, then the cost by the area of the room= (Area× $4.89 per square foot)

=24 ft^2 x $4.89

=$ 117.36

Hence, the new carpet cost is $ 117.36

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

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step-by-step explanation:

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