You can find the inverse of an equation by swapping the x and y, then solving for y.
f(x) = 4x - 12 f(x) is the equivalent of y in this case, so change it to a y
y = 4x - 12 Swap the x and y variables
x = 4y - 12
Solve for y
x = 4y - 12 Add 12 to both sides
x + 12 = 4y Divide both sides by 4
+ 3 = y Switch the sides to make it easier to read
y =
+ 3 Change y back into f(x) to match what you were given
f(x) =
+ 3
After a year, the car price dropped to £9600, already dropped by 25%, well, 100% - 25% is just 75%, therefore, <span>£9600 is really just the 75% of the original price.
now, let's say "x" is the original price and therefor the 100%, what is it?
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A1 = 2
a2 = a1 * r = 4
a3 = a2 * r = 8
a4 = a3 * r = 16
a5 = a4 * r = 32
Answer: a5 = 32
B C and F are correct I believe!
Step-by-step explanation: