So hmm the food C = 6p + 3q and the food D = 4.5p + 1.5q
now, if we check how much is the ratios of C/D for each component, then, mixture M = 144p + 60q, must contain the same ratio for each "p" and "q" component

so, if we divide the 144p by 4+3, or 7 even pieces, 4 must belong to food C and 3 to food D, retaining the ratio of 4/3
and we do the same for 60q, we divide it in 2+1 or 3 even pieces, but that one is very clear, 2 must belong to food C and 1 to food D, 60/3 is clear ends up with a ratio of 40 and 20
now the "p" part... ends up as

that's what I see it, as the ratio of 4/3 and 2/1 being retained in the mixture M
Answer:
If you have a perpendicular shape, like a plus sign, usually what I was taught, right whole side of the "plus" sign are negative. The left side is positive. I think it's how you say it.
Answer:
The first fraction at the right of 1 is
or 
Step-by-step explanation:
Given
Marks of 6ths on a number line
Fraction 5/6 just before 1
Required
What fraction is at the right 1
To get the first fraction at the right of 1, we need to get the difference between each fraction;
This is calculated as follows;

Take LCM


This implies that the difference between each mark is
.
To get the first mark at the right of 1;
We simply add the difference to 1;
This implies that;

Take LCM


Convert to mixed fraction

Hence, the first fraction at the right of 1 is
or 