C have a wonderful day and good luck with school :)
Answer:

Step-by-step explanation:
Slope of straight line can be calculated as

Here 

Equation of straight line in slope intercept form is


all the answers would be irrational.
Answer:
41
Step-by-step explanation:
yellow marbles=5+ 3r(r is the number of red marbles)
red marbles=3r
3r+3r+5=77
6r=77-5
6r=72
r=72/6=12
yellow marbles = 5 + 3r
5+ 12 x 3
5+ 36
=41