Answer:
32=x+2x+4x
32=7x
x=4.571428571428571428
and,2x=9.142857142857142857
and,4x=18.28571428571428571
Step-by-step explanation:
hope it helps
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That is a sticky one still
Answer:
Step-by-step explanation:
As B is the mid point, the length of AB = BC
5x - 3 = 2x + 9
3x = 12
x = 4
AC = 2(5(4) - 3) = 2(17)
AC = 34
Answer:
see explanation
Step-by-step explanation:
(1)
Given
- 2x = x² - 6 ( subtract x² from both sides )
- x² - 2x = - 6 ( multiply through by - 1 )
x² + 2x = 6
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(1)x + 1 = 6 + 1
(x + 1)² = 7
(2)
Take the square root of both sides
x + 1 = ±
( subtract 1 from both sides )
x = - 1 ± ![\sqrt{7}](https://tex.z-dn.net/?f=%5Csqrt%7B7%7D)
Solutions are x = - 1 -
, x = - 1 + ![\sqrt{7}](https://tex.z-dn.net/?f=%5Csqrt%7B7%7D)