-8-8x^2=-31 how to solve for x
1 answer:
Answer:
x = ±
Step-by-step explanation:
-8 - 8x^2= -31
Since this is a quadratic, it needs to be factored.
First, move the x to the other side:
-8 = 8x^2 - 31
Then, get the x alone by first adding 31:
23 = 8x^2
then dividing by 8:
x^2 = 23/8
Finally, square root both sides and remember the even roots property:
x = ±
and simplify the root 8:
x = ±
Note: This answer may have a mistake.
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The number of seconds in a year are 31,557,600 seconds, which gives;
There are approximately Pi times 10,000,000 seconds in one <u>year</u>.
<u />
<h3>How can the given statement be completed?</h3>The number of seconds in one day = 86,400
The number of seconds in one week = 604,800
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Therefore;
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The number of seconds in a year ≈ π × 10,000,000
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Answer:
It means the Judy's rate to complete the puzzle is
Step-by-step explanation:
If Judy completes a puzzle by herself, it takes her 3 hours.
Working with Sal, it only takes them 2 hours
We have been given the rates of time taken by Judy and Sal to complete a puzzle.
We can see from our given table that Sal's rate is r. We are told that Judy completes a puzzle by herself, it takes her 3 hours. working with Sal, it only takes them 2 hours.
It is given that Judy completes a puzzle by herself, it takes her 3 hours.
so part of puzzle completed by Judy in one hour would be
Therefore, the part of puzzle completed by Judy in one hour is