Answer:
7
Step-by-step explanation:
You can think of it as counting normally in a way where you can go
7:30 then add an hour to get 8:30 and so on until you hit 14. The better way of doing this using this is to just subtract the hours if the minutes are the same.
Answer:
2/3
Step-by-step explanation:
To find the slope, we use the formula
m = ( y2-y1)/(x2-x1)
= ( -8 - -10)/( 15 -12)
= ( -8+10)/( 15-12)
= 2/3
Answer: Choice B) 
==========================================
Work Shown:
This shows why choice B is the answer.
---------------
Explanation:
- In the second step, I multiplied top and bottom by
- This is so we can apply the difference of squares rule in step 3. The difference of squares rule is (x-y)(x+y) = x^2-y^2.
- In step 4, the square roots cancel out with the squaring operation. The two operations are inverses of one another, which is why they cancel.
So in general, if the denominator is 
and you want to rationalize the denominator, then you should multiply top and bottom by 
. The same applies in reverse as well.
This leads to the denominator becoming 
Keep in mind that 
and 
Jan is not correct. The opposite of any number will not always be a positive. This is because the opposite of a positive number is negative and the opposite of a negative number is positive.
Basically, opposite numbers are numbers that are the same distance to 0 on a number line. If we were to have a positive 1, the opposite of that number would be a -1, because that's equally distant from 0 on a number line.
