I think it is 290 because you add the three numbers
Answer:
x = 16
Step-by-step explanation:
(x +4) : (x +12) :: (x-1)(x +5)
As they are in proportion,
Product of means = Product of extremes
(x + 4)* (x +5) = (x + 12)(x - 1) {Use FOIL method}
x*x +x*5 +4*x + 4*5 = x *x + x*(-1) +12*x + 12*(-1)
x² + <u>5x + 4x</u> + 20 = x² <u>- x +12x</u> - 12 {Now combine like terms}
x² + 9x + 20 = x² + 11x -12
x² + 9x +20 - x² - 11x = -12
x² - x² + 9x - 11x = -12 - 20
0 - 2x = - 32
-2x = -32 {Divide both sides by -2}
x = -32/-2
x = 16
Just replace x with 0
y=0+3
y=3
and then 1
y=1+3
y=4
and then 2
y=2+3
y=5
and so on
the numerical pattern looks like this:
3 , 4 , 5 , 6 , 7 , 8 , 9.....
The answer is x-4=9 because it is 4 LESS than a number that equals 9. x would equal 9+4 which is 13.
Circumference = pi * diameter, in this case you have:
c=8p in
