The answer is C. c=47+21.
F(x) = x^4 + 81x^2
f(x) = x^2*x^2 + x^2*81
f(x) = x^2*(x^2 + 81) ... see note 1
f(x) = x^2*(x + 9i)(x - 9i) ... see note 2
note 1: if you haven't learned about complex or imaginary numbers yet, then you would stop at the line with "note 1" on it
note 2: you would stop here if you have learned about complex or imaginary numbers and you want to factor over the complex numbers. I used the rule that
a^2 + b^2 = (a+bi)*(a-bi)
Y = 2x - 3
y = (slope)x + (y-intercept)
slope is rise over run which is up 6 over right 3 ... slope = 2
y-intercept is where the graph crosses y-axis ... y-intercept = -3
If you like my answer, please make me the brainliest answer! It means a lot. :)
They've told us the net force already, which is 25 N.
We use this to calculate the unknown force from the right side.
All we do is 135 - 25 = 110 N!
We can set up a proportion to find this
60 x
--- = ----
100 1200
then we cross multiply and divide to solve
60 times 1200 is 72000 divided by 100 is 720
now we know his employer pays 720 out of 1200
we subtract to find out how much he pays
1200-720 is 480
fred pays 480
