90 kilograms because the one next to the nine is not longer then nine.
Answer:
the coin landing on heads was 54% chance and theritical the same thing
Step-by-step explanation:
The feasible region is shown in the picture above. The horizontal axis is the X axis.
If you now draw a family of lines parallel to 
through the region, increasing $C$, that is, the X-intercept, we will have the maximum value of $C$ when the line passes through the endpoint $(-2,6)$ .
Hence, $C=5(-2)+4(6)=14$
So, Katherine can do 0.1 of the job per hour. (if she needs 10 hours for the job, each hour she can do the whole divided by the time, so 1/10, which is 0.1)
if in two hours she and Marina can be done, then Marina will do 1(the whole job)-2/10 (twice as much as she can do in an hour)=0.8 of the job. So if Marina does 0.8 of the job in two hours, each hour she will do half of it: 0.4 - and this is the correct answer
