42 - 2x is the answer because x is the variable standing in for the number that will be multiplied by 2 (2x means 2 times something) and decreased by just means minus. if you haven't gotten to doing 2x then do 42 - 2*x
Answer:
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Step-by-step explanation:
Answer:

Step-by-step explanation:
Given:

Solving for above equation using common Denominator we get,

Answer: It is mutually exclusive and exhaustive.
Step-by-step explanation:
Since we have given that
Owns apple No apple Total
With kids 500.2 319.8 820
Without kids 182.4 197.6 380
Total 682.6 517.4 1200
P(Households without kids) = 
P(Households with kids) = 
And P(A∪B) = 0.316+0.683 = 0.999 ≈ 1
Since the two event are disjoint so, the probability of both occurring is 0 and the probability of either occurring is the sum of each occurring.
Hence, it is mutually exclusive and exhaustive.