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4 years ago

I'm lost!! please help!

Mathematics

2 answers:

vladimir1956 [14]4 years ago

7 0

X=9 and y=-3 if you need help comment back and i would love to help!

boyakko [2]4 years ago

6 0

Subtract both equations to get : -3y=9 , y=-3

insert y-value in one of the equations:

x+4(-3) = -3
x-12=-3
x=9

so, x= 9, and y=-3

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ddd [48]

Answer:

mabye the reflixive prop

Step-by-step explanation:

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3 years ago

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

Jim rented a truck for one day . There was a base fee of $18.95 and there was an additional charge of 74 cents for each mile dri

Oksana_A [137]

Answer:

136 miles

Step-by-step explanation:

subtract $119.59 with how much he rented the truck for, which is $18.95 which makes his money at $100.64, then divide by how much each mile costed which was 74 cents

which gives you 136 so 136 miles.

Hope this helps :)

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2 years ago

True / or / False<br>2a<br>2b<br>2c<br>2d

seropon [69]

The second is true answer.
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otez555 [7]

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