The total number of marbles is 30+20+50= 100, so. Since there are 20 red marbles and 50 blue marbles. There are 30+50=80. 80/100=4/5= 80%
Answer:
Option 4
Step-by-step explanation:

50(4)= 200
There are 200 pattern blocks.
Hope this helps!
Answer:
1/3, -7
Step-by-step explanation:
Before answering this, I will need to assume that you actually meant
y = (1/3)x - 7. Comparing this to y = mx + b, we see that the slope, m, is 1/3 and the y-intercept, b, is -7.