Let y=4x-1
The inverse is basically expressing x in terms of y.
y=4x-1 =>
y+1=4x
x=(y+1)/4
Since the inverse is still a function of x, we only have to interchange x and y
inverse of f(x) = f^-1(x) = (x+1)/4

4 0

3 years ago

Help me please!!!!!!!!!!!!!!!!!

Musya8 [376]

Hey there! Hello!

For this problem, you first need to figure out how many questions Nicholas got right, got wrong, and didn't answer. Then, you need to compare these to how many points he gets for each one. To do the first thing I mentioned, you need to add together how many problems your question accounts for, then subtract these from 100 and assume that these are questions he got wrong.

$86+6=92$
$100-92=8$

So, he has a total of 86 problems correct (times 1 will be 86 points added to his total score), 6 problems unanswered (times 0 will be 0 points that won't affect his score), and 8 problems incorrect (times –1/4, or –0.25, will be 2 points taken away from his total score).

Then, plug them into an equation. Since the unanswered questions don't count for anything, they can be omitted.

$86+(-2)=84$

Your final answer will be C.

Hope this helped you out! Feel free to ask me any additional questions if you have any. :-)

5 0

4 years ago