Subtract to find the amount of tax paid:
1890 - 1800 = 90
Divide the amount of tax by the price of the computer:
90 / 1800 = 0.05
Multiply the decimal by 100:
0.05 x 100 = 5%
The tax rate is 5%
There were 30 items on sale. Hope this helps and please give Brainliest!
Answer:
The answer is 10 12/85 Hope you pass!
Answer:
k = 12
Step-by-step explanation:
Given:
The equation ![Q(x)=2x^2-kx+18](https://tex.z-dn.net/?f=Q%28x%29%3D2x%5E2-kx%2B18)
To find:
Value of
for which the given equation has one distinct real solution.
Solution:
The given equation is a quadratic equation.
There are always two solutions of a quadratic equation.
For the equation:
to have one distinct solution:
![b^2 - 4ac = 0](https://tex.z-dn.net/?f=b%5E2%20-%204ac%20%3D%200)
Here,
a = 2,
b = -k and
c = 18
Putting the values, we get:
![(-k)^2 - 4\times 2\times 18 = 0\\\Rightarrow k^2 = 18\times 8\\\Rightarrow k^2 =144\\\Rightarrow k = 12](https://tex.z-dn.net/?f=%28-k%29%5E2%20-%204%5Ctimes%202%5Ctimes%2018%20%3D%200%5C%5C%5CRightarrow%20k%5E2%20%3D%2018%5Ctimes%208%5C%5C%5CRightarrow%20k%5E2%20%3D144%5C%5C%5CRightarrow%20k%20%3D%2012)
The equation becomes:
![Q(x)=2x^2-12x+18](https://tex.z-dn.net/?f=Q%28x%29%3D2x%5E2-12x%2B18)
And the one root is:
![2(x^2-6x+9 ) = 0\\\Rightarrow 2(x-3)^2=0\\\Rightarrow x = 3](https://tex.z-dn.net/?f=2%28x%5E2-6x%2B9%20%29%20%3D%200%5C%5C%5CRightarrow%202%28x-3%29%5E2%3D0%5C%5C%5CRightarrow%20x%20%3D%203)
Answer:
-x^5 - 7x^4 + x^2 + (1/8)x - 9
Step-by-step explanation:
Rewrite the given -9+1/8x-7x^4+x^2-x^5 in descending order of the variable x:
-9+1/8x
-x^5 - 7x^4 + x^2 + (1/8)x - 9