The degree of the polynomial x+y^2-7xy-6w^kz^2 is 10. What is the value of k?
2 answers:
Answer:
3rd option is correct.
Step-by-step explanation:
Given Polynomial,
Also. Degree of given Polynomial is 10.
Degree of the Polynomial is the highest power the of the variable part of one of the term.
Here,
Power of variable part of term x = 1
Power of variable part of term y² = 2
Power of variable part of term xy = 1 + 1 = 2
Power of variable part of term = k + 2
Since k + 2 is greater than all other power of the terms and highest power must be equal to 10.
So,
k + 2 = 10
k = 10 - 2
k = 8
Therefore, 3rd option is correct.
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Answer:
The mean number of adults who would have bank savings accounts is 32.
Step-by-step explanation:
For each adult surveyed, there are only two possible outcomes. Either they have bank savings accounts, or they do not. So we use the binomial probability distribution to solve this problem.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
In this problem, we have that:
If we were to survey 50 randomly selected adults, find the mean number of adults who would have bank savings accounts.
This is E(X) when .
So
The mean number of adults who would have bank savings accounts is 32.