The formula for an arc length is, <span>S = r<span>θ, where r is radius and <span><span>θ is theta. Theta must be in radians (which it is because you stated theta = 4 pi / 7). Multiply 5 and 4 pi / 7, the arc length will be 20 pi / 7. It will be 8.97 when you compute this into a calculator (rounded to the nearest hundredth). Found this helpful? Give it a Brainiest award.</span></span></span></span>
B) (x-3)
(4x+1)(x-3) = 4x^2 - 12x + 1x - 3 = 4x^2-11x-3
To check if x = 9 is the solution, we need to replace every x with 9 and simplify
(3+x)/4 = 3
(3+9)/4 = 3
12/4 = 3
3 = 3
We get the same thing on both sides, so the last equation is a true equation. This means that the first equation is a true equation when x = 9. Therefore, the solution x = 9 is confirmed.
Answer:
A
Step-by-step explanation:
.
(2y - x )² = (x-2y)²
So x(2y - x )² + 2x²(x - 2y)
= x(x-2y)² + 2x²( x - 2y )
= x(x-2y)[(x-2y) + 2x]
= x(x-2y)(3x-2y)
please check for mistakes.
but this is the key idea: (2y-x)²=(x-2y)².