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JulsSmile [24]
3 years ago
13

Find the value of x.

Mathematics
1 answer:
Nostrana [21]3 years ago
4 0

Answer:

21.6 degrees

Step-by-step explanation:

the sum of angles in a triangle is 180 degrees

71 + x + (4x-11) = 180

open the brackets

71 + x +4x - 1 = 180

71 + 1 + x + 4x =180

72 + 5x =180

5x = 180 -72

5x = 108

x = 108/5 = 21.6

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kykrilka [37]
First i got the area which is : A= a+b divided by 2 x height 
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Area = 6

To get the perimeter you just add all the sides together so: 3.5+2.5+2.5+2.5= 11
8 0
3 years ago
Read 2 more answers
Set up an equation to show (×+2)×5=y
Masteriza [31]
<span>5x+10 = y

Subtract 10 from both sides.

5x = y - 10

Divide both sides by 5.

x = 1/5y - 2

Plugin 1/5y - 2 for the y.
5(1/5y - 2)
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</span><span>Your Answer(s)
</span><span>y = 1
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4 0
3 years ago
The ordered pair (3,9) is a solution to the system of
nadya68 [22]

Answer:

(2,7) is not a solution to the given system of equations.

Step-by-step explanation:

Given system of equation is:

2x + 3 = y

2x + y = 15

To check whether (2,7) is solution to this system or not, we will put x=2 and y=7 in both equations.

Putting x=2 and y=7 in Eqn 1

2(2) + 3 = 7

4 + 3 = 7

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Putting x=2 and y=7 in Eqn 2

2(2) + 7 = 15

4 + 7 = 15

11 ≠ 15

The ordered pair do not satisfy the second equation.

Hence,

(2,7) is not a solution to the given system of equations.

8 0
3 years ago
Which factor contributed most to the decline of the buffalo population in the West in the late 1800s?
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Manifest destiny, as many settlers moved west after the Louisiana purchase to claim land that the U.s government was handing out. With a sudden influx of settlers and people needing to eat/make money off of their pelts. The buffalo population declined
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3 years ago
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3(X + 3) 3/4 = 81 <br> what is the answer
Genrish500 [490]

Answer:

the correct answer would be 33

Step-by-step explanation:

hope this helps :)

3 0
2 years ago
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