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$13.10 will be his tip if I’m wrong let know
That would be 950 * 0.62 = 589 British pounds.
Here is the equation:
Since both decimals are negative, the answer will be positive.
Divide both sides by -3.9 to leave the variable alone:
r is equal to 4 → r = 4
the horizontal tangent line mean y'=0
8 - 2x = 0
x = 4