5 x + y = 7 20 x + 2 = y
1 answer:
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The formula we need is this one: 
. Filling in accordingly, we have x+4(x+4+1)=x+1(x+1+11). Simplifying that we get (x+4)(x+5)=(x+1)(x+12). We will FOIL both sides to get 
. Combining like terms gives us this simplification: 0=4x-8. If we factor out the common 4, we have 0 = 4(x-2). By the Zero Product Property, eitheer 4=0 or x-2=0. Well obviously, 4 does not equal zero, so x-2 = 0, and x = 2.
Answer:
Mean of the binomial distribution
μ = 174.972 bolts
Step-by-step explanation:
<u><em>Step(i):-</em></u>
Given that Bob tested 24 bolts that he randomly picked and found that 5 were defective
The proportion of the defective item
<u><em>Step(ii):-</em></u>
Let 'x' be a random variable in a binomial distribution
Mean of the binomial distribution
μ = np
μ = 840 ×0.280
μ = 174.972
<u><em>Final answer</em></u>:-
Mean of the binomial distribution μ = 174.972 bolts