31-2=29 you add 2 to both sides so -2 cancels and you are left with X=31
the answer is 31
199.
the z score for the 90th percentile is 1.28, so you can solve the equation

which gets you the 199
7.5*.2=1.5
- 1.5= 6.5 w/ 20% off
6.5*0.0525=0.34125- rounded= .34+6.5=
$6.84
Hope this helps!!!!
Answer:

Step-by-step explanation:
