Answer:
In order to subtract fractions, there must be a common denominator (the number on the bottom of the fraction). 7 and 3 can be multiplied to get 21 (a common factor). To get each fraction to have a denominator of 21, they can be multiplied by 3 and 7 respectively and then subtracted. Attached is an image of the problem worked out. I apologize for the messy handwriting. Hope this helps!
Step-by-step explanation:
Hi im doing this test right now and what is the answer lol
<em>Please refer to the attachment for the answer and explanation. Hope it helps!!</em>
For this case, the first thing we must do is define a variable.
We have then:
p: rate in miles per hour for the last 1.5 hours
We now write the equation that models the problem.
We have then:
Rewriting we have:
From here, we clear the value of p.
We have then:
Answer:
DeAngelo's rate for the last 1.5 hours of his run is 7 miles per hour.
Answer: A and B
Step-by-step explanation:
I think that the answer is A and B because in this case, R is clearly a negative number, because it’s below 0. So if we change the symbol in front of the R, it has to be positive. Let’s say R is -20. Negative R should be - - 20, which is + 20. So -R > 0. We and also say that -R = V because there are an equal number of bounds that separate R and V from 0, and since -R is the inverse of R, it has to be equal to V.
