Answer:
x = 4 is the solution
Step-by-step explanation:
given = x ( square both sides )
x + 12 = x² ( rearrange into standard form )
x² - x - 12 = 0 ← in standard form
(x - 4 )(x + 3 ) = 0 ← in factored form
equate each factor to zero and solve for x
x - 4 = 0 ⇒ x = 4
x + 3 = 0 ⇒ x = - 3
Insert these values into the original equation, and if both sides are equal, and those are the solutions.
x = 4 : = = 4 = x ← correct
x = - 3 : = = 3 ≠ - 3 ← false
the answer is x = 4
So k=1000 like 4k=4 000 so 6/7 of a thousnad =0.857142857 so times 6=0.857142857
Um.... you gave no expression to rewrite ^^ maybe re ask it and ill answer?
Answer:
The critical <em>z</em>-value for a confidence level of 85% is ±1.439.
Step-by-step explanation:
The critical value of a distribution is the value beyond which the rejection region lies.
For a confidence interval the rejection region lies beyond two values, the positive and the negative critical value.
The confidence level is, 85%.
Compute the critical value of <em>z</em> for 85% confidence level as follows:
![\pm z_{\alpha/2}=\pm z_{0.15/2}=\pm z_{0.075}=\pm1.439](https://tex.z-dn.net/?f=%5Cpm%20z_%7B%5Calpha%2F2%7D%3D%5Cpm%20z_%7B0.15%2F2%7D%3D%5Cpm%20z_%7B0.075%7D%3D%5Cpm1.439)
*Use a <em>z</em>-table for the value.
Thus, the critical <em>z</em>-value for a confidence level of 85% is ±1.439.
Answer:
(x-1)3
3x-3
Step-by-step explanation:
I came up with this.