Answer:
Step-by-step explanation:
The point estimate is the mid-point of the interval:

The margin of error is the difference between the endpoints of the interval and the mid-point.
Answer:
x=-16 (answer : C
Step-by-step explanation:
hello:
put x=-16 in this equation : 7x-2(x+1)=6x+14
7(-16)-2(-16+1)=6(-16)+14
-112-2(-15) = -96+14
-112+30= -96+14
-82 = -82 .....true
Answer: (x+10) to the seccond power
Step-by-step explanation: 1
Use the sum-product pattern
x^{2}+{\color{#c92786}{20x}}+100
x^{2}+{\color{#c92786}{10x}}+{\color{#c92786}{10x}}+100
2
Common factor from the two pairs
x^{2}+10x+10x+100
x(x+10)+10(x+10)
3
Rewrite in factored form
x(x+10)+10(x+10)
(x+10)(x+10)
4
Combine to a square