What is probability
2 answers:
Step-by-step explanation: Probability is the likelihood that an event will happen.
We can find the probability of an event using the following ratio.
number of favorable outcomes
________________________
number of total outcomes
Let's look at an example.
On the whiteboard, I drew a spinner with 4 numbers.
The probability or likelihood of spinning a 1 would be 1/4 since there is 1 favorable outcome of spinning a 1 and 4 total outcomes.
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Answer:
Step-by-step explanation:
The correct question is
Susan works as a tutor for $10 and hour, and as a waitress for $11 an hour. This month, she worked a combined total of 90 hours at her two jobs. Let t be the number of hours Susan worked as a tutor this month. Write an expression for the combined total dollar amount she earned this month
Let
t -----> the number of hours that Susan work as a tutor
y ----> the number of hours that Susan work as a waitress
z ---> the combined total dollar amount she earned this month
we know that
-----> equation A
we know that
The combined total dollar amount she earned this month is equal to the number of hours that Susan work as a tutor multiplied by $10 plus the number of hours that Susan work as a waitress multiplied by $11
----> equation B
substitute equation A in equation B
therefore
The expression for the combined total dollar amount is $(990-t)