When you have a hard question such as 600x800 u know 6x8=48 so u can estimate the rest. (I'm not sure if this can help you but hope it does!)
There are 4 cards facing up and the rest facing down
The radius of the circle is y=-25/14
The inverse of this function is f(x) = ![\frac{3x + 15}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3x%20%2B%2015%7D%7B4%7D%20%20)
To find the inverse of any function, start by switching the x and f(x) term. Then solve for the new f(x). The result will be the inverse function. The step-by-step process is below for you.
f(x) =
----> Switch the x and f(x)
x =
----> Muliply both sides by 3
3x = -15 + 4f(x) ----> Add 15 to both sides
3x + 15 = 4f(x) ----> Divide both sides by 4.
f(x) = ![\frac{3x + 15}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B3x%20%2B%2015%7D%7B4%7D%20%20)
Uh think its 14 I'm not sure