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WARRIOR [948]
3 years ago
9

HELLOPPPPPPPPPPPOPPPPPPPPP

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
3 0
(2x+15) +x=90
- 15           = -15
2x+x= 75
3x= 75 
3   = 3
x= 25 

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Which transformation will carry pentagon EFGHI onto itself?
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Answer:

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Step-by-step explanation:

The pentagon has 5 interior angles that add up to 360. To find the angle of rotational symmetry, divide 360 by 5 (you get 72). So if you rotated the shape 72 degrees, it will map onto itself. 72 times 2 is 144, and that's rotating the shape 72 degrees twice, so it will stay the same.

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Which of the following best describes the intersection of two planes? (Points : 5)
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4 0
3 years ago
Sin(2x+30°)=1 <br> Tìm x <br> Cảm ơn vì giúp đỡ
Pie

Answer:

Step-by-step explanation:

This question is asking us to find where sin(2x + 30) has a sin of 1. If you look at the unit circle, 90 degrees has a sin of 1. Mathematically, it will be solved like this (begin by taking the inverse sin of both sides):

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On the left, the inverse sin "undoes" or cancels the sin, leaving us with

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You're welcome!

4 0
3 years ago
Consider the following system of equations:
Kobotan [32]

Answer:

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Step-by-step explanation:

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--------------

x=10-y

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20-2y+3y=45

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5 0
3 years ago
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Multiply 22 by 12 and ge tthe answer
8 0
3 years ago
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