-2 (-30) - 3y = 42
60 - 3y = 42
-3y = -18
y = 6
Answer:
b = 77
Step-by-step explanation:
a² + b² = c²
36² + b² = 85²
1296 + b² = 7225
b² = 7225 - 1296
b² = 5929

b = 77
The r-value, or common ratio, can be calculated by dividing any two consecutive terms in a geometric sequence.