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Vedmedyk [2.9K]
2 years ago
14

Can someone help me pls? I don't understand how to find x and y

Mathematics
1 answer:
coldgirl [10]2 years ago
5 0
(Y+40)+(x+2y)=180
3y+x=140

2x+(y+20)=180
2x+y=160

Simultaneous equation
3y+x=140
Y+2x=160
Solve for y
Y=24
3(24)+x=140
X=140-72=68

not sure about the answer
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The perimeter of rectangle ABCD is 256 inches. Its length is 3 times as long as its width. Find the area of triangle ABC.
Oliga [24]

Answer:

\large\boxed{A_\triangle==1,536\ in^2}

Step-by-step explanation:

The formula of a perimeter of a rectangle:

P=2(l+w)

The formula of an area of a rectangle:

A=lw

l - lenght

w - width

We have l = 3w and the perimeter P = 256 in. Substitute:

2(3w+w)=256               <em>divide both sides by 2</em>

4w=128               <em>divide both sides by 4</em>

w=32\ in\to l=3(32)=96\ in

Calculate the area of a rectangle:

A=(96)(32)=3,072\ in^2

The triangle ABC is the half of the rectangle. Therefore the area of a triangle ABC is:

A_\triangle=\dfrac{3,072}{2}=1,536\ in^2

5 0
3 years ago
I 3) At 10:30 am, a submarine was 43 feet below the ocean surface. By 10:45 am, it was 271 feet below the surface. How much did
Aleks [24]

Answer: 228 Feet

Step-by-step explanation: 271 feet - 43 feet = 228 feet descended.

3 0
3 years ago
What is the median of this data? 43, 28, 39, 19, 24, 47, 31, 20, 37
kotegsom [21]
32 Just add all the numbers up and divide by how many numbers there are (9).
7 0
3 years ago
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The heights of a group of boys and girls at a local middle school are shown on the dot plots below.
stira [4]
D, or The girls are generally taller than the boys.

Hope this helps!
8 0
3 years ago
H(x)=x-12/4 find the inverse function
Leni [432]
The inverse function is
H-1(x)=3=x

8 0
3 years ago
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