If we tag the length of the rectangle as $l$ and the width as $w$ , and if in addition we are told $l=5 w$ ,the dimensions of the rectangle are as shown in the figure.

Now, the area of a rectangle is given by:

$A=(l)(w)=320 m^{2}$

Since $l=5 w$ :

$A=(5w)(w)=320 m^{2}$

Isolating $w$ :

$5w^{2}=320 m^{2}$

$w=\sqrt{\frac{320 m^{2}}{5}}$

$w=8 m$

On the other hand, the perimeter of a triangle is given by the addition of each of its sides. Then, if the rectangle has two sides that measure $w$ and two sides that measure $5 w$ , the perimeter is:

$P=2(5)(w)+2w$

Substituting the value of $w$ in the last equation:

$P=2(5)(8 m)+2(8 m)$

Finally the perimeter is:

$P=96 m$

7 0

4 years ago

The price of a coffee machine is £86.00. The price is going to increase by 20% a) What is the multiplier for a 20% increase? b)

Vlad1618 [11]

Answer:

86 * 0.2 = 17.2

17.2 + 86 = 103.2

Step-by-step explanation:

A) the multiplier is 0.2

B) The price is 103.2

6 0

3 years ago

Multiplication property of equality if 4x/2=4 then

aleksley [76]

2x=4,x=2 is your answer

8 0

3 years ago

What is 20% off of $79.99?

MAXImum [283]

100% --- $79.99
1% --- $(79.99÷100) = $0.7999

20% off means 100% - 20% = 80%

80% --- $0.7999×80 = $63.992

Leave it to the nearest cent: $63.99 ---- Answer!

If you need further clarifications, leave a comment down below! I'll try my best to help you. :)

8 0

4 years ago

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