Answer:
The number of red circles to be added would be equal to 8 times the original amount of red circles
Step-by-step explanation:
Let
x ----> the number of red circles
y ----> the number of blue circles
Originally

----> equation A
How many more circles would need to be added to make the ratio of red to blue 3:1
Let
n ----> the number of additional red circles
----> equation B
substitute equation A in equation B

solve for n

therefore
The number of red circles to be added would be equal to 8 times the original amount of red circles
Answer:
Just divide the total cost of 21.75 by the number of friends, 3 which is 7.25
Step-by-step explanation:
Possibility of red....13/26
possibility of black....13/26
these are simplified answers.....
Answer:
the simplest form is 10/9
Do the vertical line test
16. Function
17. Not
18. Not
19. Function