Please help with this math problem! Will give brainliest!! :)
2 answers:
Answer:
i agree with the other person
Step-by-step explanation:
also can you help me out
Answer:
x = 20
y = 70
Step-by-step explanation:
Solve for x:
5x - 20 = 3x + 20
2x - 20 = 20
2x = 40
x = 20°
Solve for y:
x + y = 90°;
(20) + y = 90°
y = 90 - 20
y = 70°
Hope this helps!
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Answer:
c
Step-by-step explanation:
I think it’s 5 but don’t get mad if it’s wrong
Answer: 9
Step-by-step explanation:
Given
The function is ![x^2-6x+c](https://tex.z-dn.net/?f=x%5E2-6x%2Bc)
To make it a perfect square, compare it with ![(a-b)^2=a^2+b^2-2ab](https://tex.z-dn.net/?f=%28a-b%29%5E2%3Da%5E2%2Bb%5E2-2ab)
Here,
![x=a,\\-6x=-2ab\\\\\therefore b=3](https://tex.z-dn.net/?f=x%3Da%2C%5C%5C-6x%3D-2ab%5C%5C%5C%5C%5Ctherefore%20b%3D3)
So, c must be square of b i.e. 9
![x^2-6x+c\Rightarrow x^2-6x+9\\\Rightarrow (x-3)^2](https://tex.z-dn.net/?f=x%5E2-6x%2Bc%5CRightarrow%20x%5E2-6x%2B9%5C%5C%5CRightarrow%20%28x-3%29%5E2)
Therefore, value of c is 9.
Answer:
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Step-by-step explanation:
![-4f+2(4f-5)=-19\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\-4f+(2)(4f)+(2)(-5)=-19\\\\-4f+8f-10=-19\qquad\text{add 10 to both sides}\\\\-4f+8f-10+10=-19+10\qquad\text{combine like terms}\\\\4f=-9\qquad\text{divide both sides by 4}\\\\\dfrac{4f}{4}=\dfrac{-9}{4}\\\\\boxed{f=-\dfrac{9}{4}}](https://tex.z-dn.net/?f=-4f%2B2%284f-5%29%3D-19%5Cqquad%5Ctext%7Buse%20the%20distributive%20property%7D%5C%20a%28b%2Bc%29%3Dab%2Bac%5C%5C%5C%5C-4f%2B%282%29%284f%29%2B%282%29%28-5%29%3D-19%5C%5C%5C%5C-4f%2B8f-10%3D-19%5Cqquad%5Ctext%7Badd%2010%20to%20both%20sides%7D%5C%5C%5C%5C-4f%2B8f-10%2B10%3D-19%2B10%5Cqquad%5Ctext%7Bcombine%20like%20terms%7D%5C%5C%5C%5C4f%3D-9%5Cqquad%5Ctext%7Bdivide%20both%20sides%20by%204%7D%5C%5C%5C%5C%5Cdfrac%7B4f%7D%7B4%7D%3D%5Cdfrac%7B-9%7D%7B4%7D%5C%5C%5C%5C%5Cboxed%7Bf%3D-%5Cdfrac%7B9%7D%7B4%7D%7D)
I guess you're supposed to simplify?
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![=\tan x(\cos^2x+\sin^2x)](https://tex.z-dn.net/?f=%3D%5Ctan%20x%28%5Ccos%5E2x%2B%5Csin%5E2x%29)
![=\tan x](https://tex.z-dn.net/?f=%3D%5Ctan%20x)