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anastassius [24]

3 years ago

14

The length is twice its width . if area of the rectangle is 200 in 2 find the perimeter

1 answer:

inna [77]3 years ago

5 0

Length=2x
width =x

if x=10
length=2(10)=20
width =10

length×width=area
20×10=200

length+length+width+width=perimeter
20+20+10+10=60

the perimeter is 60

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You can see if they are similar by looking at the sides.

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24/3 = 8
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4 years ago

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An elliptical culvert is 3.5 feet tall and 6 feet wide. It is filled with water to a depth of 0.95 feet. Find the width of the s

maks197457 [2]

Answer:

$W_s \approx5.3$

Step-by-step explanation:

From the question we are told that

Height $H=3.5ft$

Weight $W= 6ft$

Depth $D=0.95ft$

Generally the equation for ellipses is given as

$\frac{x^2}{a^2} +\frac{y^2}{b^2} =1$

Where

$b=H/2\\b=3.5/2\\Therefore\\b=1.75\\a=W/2\\a=6/2\\Therefore\\a=3\\$

$\frac{x^2}{3^2} +\frac{y^2}{1.75^2} =1$

Generally to find y in the equation $\frac{x^2}{a^2} +\frac{y^2}{b^2} =1$

$y=-b+d$

$y=-1.75+0.95$

$y=-0.8$

Therefore

$\frac{x^2}{3^2} +\frac{(0.8)^2}{1.75^2} =1$

$\frac{x^2}{3^2} =1-\frac{(0.8)^2}{1.75^2}$

$\frac{x^2}{3^2} =1-0.2089795918$

$X^2 =3^2(1-0.2089795918)$

$X^2 =7.119183674$

$X =\sqrt{7.119183674}$

$X =2.66817984$

Therefore the width of the given stream is

$W_s=2.66817984*2$

$W_s=5.33635968$

$W_s \approx5.3$

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3 years ago

a line passes through the point (-10,9) and has a slope of -1/2 write a equation in slope-intercept form for this line

Olegator [25]

Answer:

$\displaystyle y = -\frac{1}{2}x + 4$

Step-by-step explanation:

9 = −½[−10] + b

5

$\displaystyle 4 = b \\ \\ y = -\frac{1}{2}x + 4$

I am joyous to assist you anytime.

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3 years ago

When written as a percentage and a decimal, 7/8 becomes?

ivann1987 [24]

7/8 is written as a decimal is 0.875

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3 years ago