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Tasya [4]
3 years ago
10

PLEASE HELP - Find the value of x.

Mathematics
1 answer:
Colt1911 [192]3 years ago
4 0

Answer:

x=75

Step-by-step explanation:

1. Triangles are always equal to 180 degrees

2. Subtract first known angle:180- 75= 105

3. Subtract second known angle: 105-30=75

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Step-by-step explanation:

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8 0
3 years ago
How do you solve y=2x+7; 3x-y=-9 using substitution method. Explain please!!
eduard
The y's value is given in the first equation. y=2x+7 . Now to solve, we will, plug it's value in the second equation.

3x-(2x+7)=-9\\ \\ 3x-2x-7=-9\\ \\ x=-9+7\\ x=-2\\

Now we have x's value, we will plug it's value in the first equation.(We can plug it in the second one too, but plugging it the first one will make it easier.)

x=-2\\ y=2x+7\\ y=2\cdot -2+7\\ y=-4+7\\ y=3




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Need help with #11-#12 also I have to draw a triangle
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Step-by-step explanation:

Picture is not clear

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