Answer:
It would take 12 hours for his associate to do the complete work alone.
Step-by-step explanation:
Let 'x' be the hours taken by his associate working alone.
Given:
Time to paint the office by Dave is 4 hours.
Time to paint the office together is 3 hours.
Therefore, the part of work completed by Dave alone in 1 hour is
Part of work completed by an associate in 1 hour is
Now part of work completed by both in 1 hour is
Therefore,
Therefore, it would take 12 hours for his associate to do the complete work alone.
What is the 10th term of the sequence?
Answer: 23
Explanation: First of all, let's make sure we have an arithmetic sequence. An arithmetic sequence is a sequence that has a common difference which is the number repeatedly added or subtracted to reach the next term.
To get from -4 to -1, we're adding 3.
To get from -1 to 2, we're adding 3.
To get from 2 to 5, we're adding 3.
So we know that this is an arithmetic sequence because it has a common difference or the number that is repeatedly added which is 3.
Now, we want to determine the 10th term in this sequence.
There are 2 ways that you can determine the 10th term. You can keep on adding 3 until you get to the 10th term or you can use the explicit formula. I will show you the explicit formula which is shown below.
Now we want to determine what the 10th term is so we're trying to determine . Now, we know what is because it's our first term or -4. Now, n will be the number of terms we're solving for or 10. Lastly, we have the d which represents the common difference which is 3.
So plugging into the formula, we have .
Now, make sure we apply order of operations because this is where many students make mistakes.
(10 -1) is going to be 9. Then we want to make sure we multiply before we add so 9 x 3 is going to be 27 and then -4 + 27 is 23.
So the 10th term in this sequence is 23.
what is .69 in a fraction (simple form)
please answer