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AnnyKZ [126]
3 years ago
8

I NEED HELP ON DOING THIS

Mathematics
2 answers:
-BARSIC- [3]3 years ago
5 0
1. Write out an equation to solve this.
2x + 7x - 9 = 90 degrees

2. Add 2x to 7x
9x - 9 = 90 degrees

3. Add 9 to both sides of the equal sign
9x = 99 degrees

4. Divide 9x by 9 to get x
x = 11 degrees
stira [4]3 years ago
4 0
If all the angles add up to 90 degrees then you can set the equation 7x-9*2x=90
Simplify
9x-9=90
Plus 9 both sides
9x=99
Divide by 9 on both sides
X=11
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Cos(−θ)=√3/3, sinθ<0
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Answer:

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According to the Pythagorean identity,

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But we were given that,

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The correct answer is B







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  • The Fundamental Counting Principle is a method to calculate the number of possibilities by multiplying the events together to get the total number of possibilities.

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