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:
Step-by-step explanation:
Area of the field = pi * r^2
r = 230/2 = 115
Area of the field = 3.14 * 115^2 = 41526.5 square feet.
Number of bags = 41526.5/400 = 103.82 bags
Answer:
5
Step-by-step explanation:
Answer:
As a decimal its 6.34, If you round up then its 6.35
As a fraction its 400/63
As a mixed number its 6 22/63
Answer:
y = - 1/6 x + -1
Step-by-step explanation:
