This is the picture I am not very good at proofs but hopefully someone can solve it.
To solve for s all you have to do is factor the 7 and simplify the rest.
7s-21=21
7s=42
s=6
Number of pencils x
number of pens y
3x + y = 10
x ≤ y
Draw the line 3x + y = 10 .[it passes by (0,10) and (-10/3,0)
Draw the line y=x [it passes by (0,0), (1,1), (2,2) etc]
Then the solution is the points with integer x and y, that belong to the segment of the line 3x +y = 10 between the x-axis and the line y=x. Those points are (1,7) , (2,4), (3, 1).
The answer to this question is letter a
Answer:
Your right the answer is B a=60
, b=120
A ratio of 1:2 just means one value is twice that of the other.
