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andrew-mc [135]
3 years ago
5

The length of a rectangle is 3 units shorter than one-third of the width, x. Enter an expression in the box that represents the

perimeter of the rectangle. Note: Use one variable and a fraction in the answer.
Help please! I have absolutely no idea how to solve!!!! ^^^
Mathematics
2 answers:
cluponka [151]3 years ago
7 0
Since length is 3 less than 1/3 width, set up equation l=(1/3)w-3. Because P=2(l+w), substitute l with the euation and get P=2(4/3w-3)
Rashid [163]3 years ago
7 0

Let

y----------> the length side of the rectangle

x-----------> the width side of the rectangle

we know that

the perimeter of the rectangle is equal to

P=2x+2y --------> equation 1

y=\frac{x}{3}-3 --------> equation 2

substitute equation 2 in equation 1

P=2x+2[\frac{x}{3}-3]\\ \\P=2x+ \frac{2x}{3}-6 \\ \\P=(\frac{8x}{3}-6)\ units

therefore

<u>the answer is</u>

P=(\frac{8x}{3}-6)\ units

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Step-by-step explanation:

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8 0
3 years ago
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The petronas towers in Kuala Lumpur, Malaysia, are 452 meters tall. A woman who is 1.75 meters tall stands 120 meters from the b
bazaltina [42]

Answer:

75.1^{\circ}

Step-by-step explanation:

In this problem, we have:

H = 452 m is the height of the Petronas tower

h = 1.75 m is the height of the woman

d = 120 m is the distance between the woman and the base of the tower

First of all, we notice that we want to find the angle of elevation between the woman's hat the top of the tower; this means that we have consider the difference between the height of the tower and the height of the woman, so

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Now we notice that d and H' are the two sides of a right triangle, in which the angle of elevation is \theta. Therefore, we can write the following relationship:

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since

H' represents the side of the triangle opposite to \theta

d represents the side of the triangle adjacent to \theta

Solving the equation for \theta, we find the angle of elevation:

\theta = tan^{-1}(\frac{H'}{d})=tan^{-1}(\frac{450.25}{120})=75.1^{\circ}

3 0
3 years ago
HELPPPPPPP!!!!! ASAPPPPPP!!!!
Xelga [282]

Answer: I think your answer would be B

i hope it's right

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