X^4=256
x^4-256=0
(x^2)^2-(16)^2=0
(x^2+16)(x^2-16)=0
either x^2+16=0
it gives complex roots.
or x^2-16=0
or x^2-4^2=0
(x+4)(x-4)=0
either x+4=0,x=-4
or x-4=0
x=4
Answer: d
Step-by-step explanation:
10 - 6x = 160 - 10x
+6x +6x
-10 + 6 = -4
10 = 160 - 4x
-160
10 - 160 = -150
-4x = -150
-4x/4 = -150/-4
x= 37.5
Answer:
sure lets talk im bor ed
Step-by-step explanation:
Answer:
And the best answer would be:
b. 0.074.
Step-by-step explanation:
For this case we have the following info given:
represent the number of people who answer yes for the question
the sample size selected
the proportion estimated of people who answer yes
The margin of error is given by:
The confidence level is 90% and the significance would be 
and the critical value would be:
And replacing we got:
And the best answer would be:
b. 0.074.
