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7nadin3 [17]
3 years ago
10

Reflection across y=-2​

Mathematics
1 answer:
kherson [118]3 years ago
8 0

Answer: 10

Step-by-step explanation:

Msnhajhagsshnsbbsgsjsjsnjsjs

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The perimeter of a triangle is 170 feet and the sides are in the ratio of 25:14:12. Find the area of the triangle.
Viktor [21]
Let
x,y, and z the long sides of the triangle 

we know that

x+y+z=170 ft------> equation 1
x/y=25/14----> y=14x/25------> equation 2
y/z=14/12-----> equation 3
x/z=25/12----> z=12x/25------> equation 4

substitute equation 2 and equation 4 in equation 1
x+[14x/25]+[12x/25]=170------> multiply by 25 both sides
25x+14x+12x=4250
51x=4250
x=4250/51
x=250/3
y=14x/25------> y=(250/3)*(14/25)----> y=140/3
z=12y/14-----> (140/3)*12/14----> z=40

Using Heron's formula,
Area of the triangle = √s (s-a) (s-b) (s-c)
where s is the semiperimeter
s=170/2-----> s=85 ft
Area=√85*[85-250/3]*[85-140/3]*[85-40]
Area=9.22*[1.67]*[38.33]*[45]------> Area=26558.21 ft²

the answer is
26558.21 ft²
6 0
4 years ago
The subject of the formula below is y.
Anna007 [38]

Answer:

x = y + 8

Step-by-step explanation:

Given

y = x - 8 ( add 8 to both sides )

y + 8 = x

4 0
3 years ago
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Please help its due tonight!!
Lynna [10]

Answer:

your really think ik the answer

Step-by-step explanation:

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8 0
3 years ago
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Use Greens Theorem to evaluate integral x^2ydx - xy^2dy, where C is 0 ≤ y ≤ √9-x^2 with counterclockwise orientation
Ratling [72]

Answer:

Step-by-step explanation:

a circle will satisfy the conditions of Green's Theorem since it is closed and simple.

Let's identify P and Q from the integral

P=x^2 y, and Q= xy^2

Now, using Green's theorem on the line integral gives,

\oint\limits_C {x^2ydx-xy^2dy } =\iint\limits_D {y^2-x^2} \, dA\\\\

3 0
3 years ago
Learn with an example<br> Find the perimeter. Simplify your answer.<br> y-6<br> y-5<br> y-5<br> y-6
koban [17]

Answer:

P = 22

Step-by-step explanation:

P= l(2) + w(2)

5(2) + 6(2)

10 + `12

22

6 0
3 years ago
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