Hi,
Work:

Multiply both sides by 144.

Move X to left side and change its side.

Calculate the sum

Divide both sides by 80.

+++ Results +++
Fraction form:

Or decimal form:

Hope this helps.
r3t40
Answer:
X=6
Step-by-step explanation:
Your answer is -0.364 <span />
<span>If a sample of 9 test scores is taken, there is approximately a 68% chance that the scores will be between the scores of 220 and 340, a 95% chance that they will be between 160 and 400 and a 99.7% chance the scores will be between 100 and 460.</span>
Answer:
4(x+1)^2-1
Step-by-step explanation:
use b/2^2 in order to create a new term to completed the square
hope this helps ''whole lotta love'' NUNU