21x -15 + 5 = 10x - 5
21x -5 = 10x
11x = 5
x = 5/11
Step-by-step explanation:
The scientific notation:

<em>1 ≤ a < 10</em> and <em>k -</em><em> any integer number</em>
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No, she is NOT correct because for example, if 20 is multiplied by 4/5 then it first has to be multiplied by 4 then divided by 5 (even though you can use cross multiplying) EX: 20×4=80/5=16
Answer:

Step-by-step explanation:
The decimal 0.25 can simply be converted into a fraction by putting it over 100.
0.25 = 
Then, simply divide both the numerator and denominator by 25 to get
, or 
Hope it helps :)
Answer:
-2
Step-by-step explanation:
Given:
Slope formula:
Using the given points:
- m = (2- 6)/(4 - 2) = -4/2 = -2