Do you mean something like y+2=2+y? Please elaborate
Answer:
no they are not because 11, 14 is the only one that has a vertices
Step-by-step explanation:
Answer: Option A. 1.5
Mean shoe size of the students in a math class: µ=7.5
Standard deviation: σ
Most of the shoe sizes (x) fall within 1 standard deviation:
µ-1σ<x< µ+1σ
µ-σ<x< µ+σ
<span>or between a size 6 and a size 9:
</span>6<x<9
Comparing µ-σ<x< µ+σ with6<x<9:
µ-σ=6 or µ+σ=9
Replacing µ=7.5 above:
7.5-σ=6 or 7.5+σ=9
Solving for σ:
7.5-σ-7.5=6-7.5 or 7.5+σ-7.5=9-7.5
-σ=-1.5 or σ=1.5
σ=1.5 or σ=1.5
Then σ=1.5
8is the answer. Plug in 8 for x and solve
