What is the area of a room that is 2 3/4 yards long by 2 1/2 yards wide?

Mathematics

2 answers:

Virty [35]3 years ago

6 0

I think it is 6 7/8 since 2 3/4 x 2 1/2 =6 7/8

nydimaria [60]3 years ago

4 0

Is long by 2 1 /2 yards wise

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ladessa [460]

X = amount of the 18% solution

y = amount of the 40% solution

we know the 18% solution has only 18% of alcohol, the rest is maybe water or something, now, how many liters is 18%? well, 18% of anything is just (18/100) * anything, so, 18% of x is just (18/100) *x or 0.18x, and that's how many liters are there.

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$\bf \begin{array}{lccclll}
&\stackrel{liters}{amount}&\stackrel{alcohol~\%}{quantity}&\stackrel{liters}{alcohol}\\
&------&------&------\\
\textit{18\% solution}&x&0.18&0.18x\\
\textit{40\% solution}&y&0.40&0.4y\\
------&------&------&------\\
mixture&10&0.20&2
\end{array}$

$\bf \begin{cases}
x+y=10\implies \boxed{y}=10-x\\
0.18x+0.4y=2\\
----------\\
0.18x+0.4\left( \boxed{10-x} \right)=2
\end{cases}
\\\\\\
0.18x-0.4x+4=2\implies -0.22x=-2
\\\\\\
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4 years ago

Share £180 in the 4:5

marissa [1.9K]

4 + 5 = 9
£180 / 9 = £20

£20 x 4 = £80
£20 x 5 =£100

Answer:
£80 : £100

hope it helped :)

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