Hey there,
SITE A:
Original = $1,250
Discounted = $1,250 x (20% x 1,250)
= $1,000
SITE B:
Original Price = $1000 + $20
= $1,020
Site A is cheaper.
$1,020 - $1,000 = $ 20
(20 / 1,020) x 100% = 1.96%
Hope this helps :))
~Top
Answer:
![\large\boxed{\red{\sf x =6+\sqrt{53},6-\sqrt{53}} }](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Cred%7B%5Csf%20x%20%3D6%2B%5Csqrt%7B53%7D%2C6-%5Csqrt%7B53%7D%7D%20%7D)
Step-by-step explanation:
We would like to solve the given quadratic equation by <u>c</u><u>o</u><u>m</u><u>p</u><u>l</u><u>e</u><u>t</u><u>i</u><u>n</u><u>g</u><u> </u><u>the</u><u> </u><u>square</u><u> </u><u>method</u> .The given equation is ;
![\longrightarrow x^2=12x +17](https://tex.z-dn.net/?f=%5Clongrightarrow%20%20x%5E2%3D12x%20%2B17)
Subtract 12x to both sides ,
![\longrightarrow x^2-12x = 17](https://tex.z-dn.net/?f=%5Clongrightarrow%20x%5E2-12x%20%3D%2017%20)
Here the co-efficient of x² is already 1 . So , we shall rewrite it as ,
![\longrightarrow x^2-2(6)(x) = 17](https://tex.z-dn.net/?f=%5Clongrightarrow%20x%5E2-2%286%29%28x%29%20%3D%2017%20)
Add 6² on both sides ,
![\longrightarrow x^2-2(6)(x) + 6^2=17+6^2](https://tex.z-dn.net/?f=%5Clongrightarrow%20x%5E2-2%286%29%28x%29%20%2B%206%5E2%3D17%2B6%5E2%20%20)
Now LHS is in the form of (a-b)² = a²-2ab+b² ; so that ;
![\longrightarrow (x -6)^2 = 17+36](https://tex.z-dn.net/?f=%5Clongrightarrow%20%20%28x%20-6%29%5E2%20%3D%2017%2B36%20)
Simplify RHS ,
![\longrightarrow (x-6)^2=53](https://tex.z-dn.net/?f=%5Clongrightarrow%20%28x-6%29%5E2%3D53%20)
Put square root on both sides,
![\longrightarrow (x-6) = \pm\sqrt{53}](https://tex.z-dn.net/?f=%5Clongrightarrow%20%20%28x-6%29%20%3D%20%5Cpm%5Csqrt%7B53%7D)
Add 6 on both sides,
![\longrightarrow x = 6\pm\sqrt{53}](https://tex.z-dn.net/?f=%5Clongrightarrow%20x%20%3D%206%5Cpm%5Csqrt%7B53%7D%20)
Separate the two solutions ,
![\longrightarrow \underline{\underline{x =6+\sqrt{53},6-\sqrt{53}}}](https://tex.z-dn.net/?f=%5Clongrightarrow%20%5Cunderline%7B%5Cunderline%7Bx%20%3D6%2B%5Csqrt%7B53%7D%2C6-%5Csqrt%7B53%7D%7D%7D%20%20)
And we are done!
Answer:
The answer is The text says "how manny will you need in all" so you should add 35 + 28 to get the answer
it can be used to calculate the length of a circular bracelet