Answer:
She is correct because they need to find how much is the discounted price, which is 3. So to see what percentage it is, they need to see how much 3 is worth in comparison to 15. If we spilt 15 into 5 parts to make every part worth 20%, the answer would be 3. Thus Arianna is correct.
Step-by-step explanation:
Answer:
Step-by-step explanation:
Part A
Since, the given angles are formed at a point are on a straight line, sum of these angles will be 180°.
Part B
(3x - 5)° + (4x + 2)° + (2x + 3)° = 180°
9x = 180
x = 20
Part C
m∠ADB = (3x - 5)°
= (3×20 - 5)°
= 55°
m∠DBK = (4x + 2)°
= (4×20 + 2)°
= 82°
m∠KBC = (2x + 3)°
= (2×20 + 3)°
= 43°
Answer:
Step-by-step explanation:
Given,
![f(x)=-x^{2} +6x-1\\g(x)=3x^{2} -4x-1](https://tex.z-dn.net/?f=f%28x%29%3D-x%5E%7B2%7D%20%2B6x-1%5C%5Cg%28x%29%3D3x%5E%7B2%7D%20-4x-1)
we know,
(f-g)(x)=f(x)-g(x)
So, here we get
(f-g)(x)
=f(x)-g(x)
=![-x^{2} +6x-1-(3x^{2} -4x-1)](https://tex.z-dn.net/?f=-x%5E%7B2%7D%20%2B6x-1-%283x%5E%7B2%7D%20-4x-1%29)
=![-x^{2} +6x-1-3x^{2} +4x+1](https://tex.z-dn.net/?f=-x%5E%7B2%7D%20%2B6x-1-3x%5E%7B2%7D%20%2B4x%2B1)
=![-x^{2}-3x^{2} +6x+4x-1+1](https://tex.z-dn.net/?f=-x%5E%7B2%7D-3x%5E%7B2%7D%20%2B6x%2B4x-1%2B1)
=![-4x^{2} +10x](https://tex.z-dn.net/?f=-4x%5E%7B2%7D%20%2B10x)
So, the answer is
![-4x^{2} +10x](https://tex.z-dn.net/?f=-4x%5E%7B2%7D%20%2B10x)
I’m just doing this to finish my account stuff haha but good luck