Find the difference (x^2+3y-3)-(-2x^2+3y-1)
2 answers:
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Answer:
Step-by-step explanation:
1. You have the following phrase given in the problem: 16 times as many books. You can conclude this is a multiplication word problem, because:
- Let's call the number of books.
- "As many boooks" indicates multiplication.
- 16 times means that should be multiplied by 16.
2. Then, you can conclude that the expression that best represent the phrase is:
Answer:
Step-by-step explanation:
We will use the standard formula for half-life:
Where A₀ is the initial amount, a is the half-life, d is the time for one half-life, and t is the number of days.
So, we will substitute 1/2 for a and 24.3 for d. This yields:
We have a 3 gram sample. Therefore, our initial amount A₀ is 3:
And we want to find the remaining sample after 10 days. So, t=10. Substitute:
Use a calculator. So:
Therefore, for a 3 gram sample of Phosphorous-32 with a half-life of 24.3 days, after 10 days, there will be approximately 2.255 grams remaining.
Use can you slope formula:
Then, substitute values into the formula.
Then solve. You get the fraction,
. That is your slope.
Then, substitute values into the formula.
Then solve. You get the fraction,