Answer:
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Step-by-step explanation:
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<1 = 120/2 = 60
answer
60 <span>degrees</span>
3 packs of pencils ( 30 pencils)
5 packs of erasers (30 erasers)
x=7x-21
Step-by-step explanation:
- x=7x-21
- 21=7x-x
- 21=6x
- x=21/6
- x=7/2
- x=3.5
Mu=80, sigma=39, X=85
Z=(X-mu)/sigma = 5/39=0.128=0.13
P(X<=85)= 0.5517 (from Z-table)
so, P(X>85)=1-0.5517=0.4483 approx. thats 44.8% probability.