A is 4.5 b is 3.2 c is 4.05 d 3.6
It's a reflection across the x axis, so the y intercept won't change (12)
f (x) = 3x + 12
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g(x) = -3x + 12
I MAY BE WRONG IM ONLY 80% SURE
The answer: $24.05
How to:
Go through the graph and add all the values together
Then subtract $3.00 from the cost
Then add 4% sales tax
3 = 3/4(b - 8)
Switch sides
3/4(b - 8) = 3
Next, multiply both sides by 4
4 * 3/4(b - 8) = 3 * 4
Then simplify,
3(b - 8) = 12
Next, divide both sides by 3
3(b - 8)/3 = 12/3
Then, simplify
b - 8 = 4
Then, add 8 to both sides
b - 8 + 8 = 4 + 8
Simplify, b = 12
the median of her 20 students is 82.5
