The answer is <span>1) ± √x+81
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Step 1: Substitute y for f(x). <span>
Step 2: </span>Since every (x, y) has its partner (y, x)y switch x and y.
Step 3: <span>Solve for y.
Step 1.
The function is: f(x) = x</span>² - 81
Substitute y for f(x): y = x² - 81
Step 2.
Switch x and y: x = y² - 81
Step 3.
Solve for y (which is now f⁻¹(x)): f⁻¹(x) = y
x = y² - 81
y² = x + 81
y = +-√(x+81)
Therefore, the choice 1) is correct.
Answer:
x+z=m
Step-by-step explanation:
You do 28/100 which is 0.28
You then multiply this by 21
28/100 x 21 = 5.88
Answer:
It would be -5
Step-by-step explanation:
