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2 votes
Help me please I’m struggling with this subject :/

Help me please I’m struggling with this subject :/-example-1

2 Answers

5 votes

well, we don't know the cost of the carpet, however hmmm we know the cost of the carpet is 4 bucks per ft², which means we need to know how many ft² the Randall family is going to use in the first place hmmmm, Check the picture below.


\textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} h=height\\ a,b=\stackrel{parallel~sides}{bases}\\[-0.5em] \hrulefill\\ a=12\\ b=15\\ h=10 \end{cases}\implies \begin{array}{llll} A=\cfrac{10(12+15)}{2} \\\\\\ A=\cfrac{10(27)}{2}\implies A=135~ft^2 \end{array} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{per~ft^2}{(4)}~~\stackrel{area~in~ft^2}{(135)}\implies \stackrel{\$}{540}\impliedby \textit{total cost}

Help me please I’m struggling with this subject :/-example-1
User Chris Morley
by
7.4k points
10 votes

Answer:

I believe the answer is 135 square feet.

Explanation:

so 10x12=120. 10x3=30 and you divide the triangle by 2 so 30/2=15. 120+15=135

User Planck Constant
by
8.5k points

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