What value of x makes the equation true?
4x - 3= -9 + 7x
A.) -2
B.) 1/2
C.) 2
D.) −1/2

C.) 2

Step-by-step explanation:

4x - 3= -9 + 7x

Subtract 4x from each side

4x-4x - 3= -9 + 7x-4x

-3 = -9 +3x

Add 9 to each side

-3+9 =-9+9 +3x

6 =3x

Divide each side by 3

6/3 = 3x/3

2 =x

Look at the attached picture⤴

Hope this will help u...

B) be narrower than the current interval width

Step-by-step explanation:

Given that a 95% confidence interval for μ has been constructed.

This confidence interval would depend on the margin of error which in turn depends on the standard error and sample size.

Margin of error = Critical value *std dev/ sqrt of sample size n

Hence when sample size increases, n increases so square root of n increases, which in turn decreases the margin of error.

So confidence interval would become narrower.

B) be narrower than the current interval width