B. r = 75m + 1350 I think is the answer. I hope this helped you!
i’m pretty sure the answer is 3
21 divided by 7 equals 3
Let
x--------> the number of blue beads
y--------> the number of red beads
we know that

-------> equation 
------> equation 
equate equation
and equation 

find the value of x

therefore
the answer is
Ivan has

I don't know if this is right, but I'm pretty sure it's B.
Answer:
1: 105 degrees
2: 75 degrees
Step-by-step explanation:
2 is a corresponding angle with 75.
1 is supplementary so x+75 = 180
x=105