You got the equation correct
3 1/16=49/16. I hope this helped. :) Brainlest answer ? :)
Answer:

Step-by-step explanation:
Given function is,
f(x) = -8x² + 4
Step to find the inverse of the function,
Step 1
Write the function in the form of an equation,
y = -8x² + 4
Step 2
Interchange the variables 'x' and 'y',
x = -8y² + 4
Step 3
Solve the equation for y,
x = -8y² + 4
x - 4 = -8y²
-x + 4 = 8y²
y² = 

Therefore, inverse of the function f(x) will be,

420÷8=52.5
the answer is 52.5 words per minute
Answer:
233.53 s
Step-by-step explanation:
The sum of best times for the legs is ...
56.81 +59.22 +57.39 +60.11 = 233.53 . . . seconds
Without additional information about the effects of training or the normal variation in times, this is the best prediction we can make.