20% because the 15-12=3 and then you cross multiply 3 and 100 and then you divide by 15. Which is 20.
3. x
-- --
15 100
The least common multiple of 3 and 7 is 21
3,6,9,12,15,18,21
7,14,21
Answer:
The equation of line in the form of Ax + By = C is: 
Step-by-step explanation:
We need to find the equation of line, with the given slope passes through the given point.
Slope m = -4
Point: (-2,-9)
We need to find slope and y-intercept of the line.
The slope of line is given m = -4
Now, we need to find the y-intercept
Using the point (-2,-9) and slope m = -4, we can find y-intercept
The formula used will be: 
Putting values of: y= -9, x =-2 and m = -4

So, y-intercept b = -17
Now, the equation of required line having slope m = -4 and y-intercept b = -17 is:

Writing equation in required form i.e. of Ax + By = C

So, the equation of line in the form of Ax + By = C is: 
Answer:
4500 gr
Step-by-step explanation:
4.5 kg equals some number (n) times one gram. Solve this for n:
4.5 kg = n(1 gr)
Recall that 1 kg = 1000 gr. Because of this, the equation above becomes
4.5 kg (4.5)(1000 gr)
n = --------------- or ------------------- or 4500 gr
1000 gr 1 gr