If two witches were watching two watches, which witch would watch which watch?
1 answer:
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Given:
Mary is paid $12 per hour at her weekend part-time job.
She earns an average of $132 each weekend, but her earnings can vary by $36.
To find:
The inequality for number of hours.
Solution:
Let h be the number of hours Mary could work in one weekend.
Total earning for h hours = $12h
She earns an average of $132 each weekend, but her earnings can vary by $36. So,
Divide all sides by 12.
Therefore, the correct option is D.
Answer:
Step-by-step explanation:
Let f be a function from N to N.
N_set of all natural numbers
i) one to one but not onto
consider the function
When two numbers have same square we find that the numbers should be the same because they are positive.
So one to one but not onto because consider 3 it does not have square root in N.
ii) Onto but not one to one
Consider
this is onto because every number has a preimage in N.
But not onto because consider 6 and 3, f(6) = 3 and f(3) =3
So not one to one
iii) both onto and one-to-one
f(x) =
=x+1, x even
This is both one to one and onto since we consider only integers
iv) Neither one to one nor onto
Consider the function
f(x) = 2
This is not onto because 3 cannot have a preimage in N, not one to one because f(1) = f(2) where 1 not equals 2