Step-by-step explanation:
(a/b*b/c=1/2*3/4)(a/c=3/8)
Hi!
When you add a negative number, you really just subtract it. So let's solve this.
Convert the mixed numbers into improper fractions.

Solve
434 - 351 = 83

The sign of this fraction is positive
Hope this helps! :)
-Peredhel
The answers is a because the radius must be 5
Answer:
105.
Step-by-step explanation:
21+21+21+21+21=105.