The problem is that when they distributed they added -6 + 3 which does equal 9 but, you multiply when there is parenthesis.
When the expression is correctly simplified, the answer is: x - 6
Not really, If you use the Pythagorean theorem on all problems related to distance.. You won't always be able to solve it. It depends on the numbers.
So, false.
This would be cos^2x, because when you foil out the equation you get 1-sin^2(x).
1-sin^2(x)=cos^2(x)
To get rid of the denominator, you have to multiply each side by three, which leaves πr^2 h = 3V, then to get h alone, you need to divide by πr^2 (Since that's being multiplied by h, you wouldn't subtract), so the end equation would be B.
