A: b + 9
Step-by-step explanation:
If it's the sum of two numbers it is addition, meaning that you add the number of blue bikes(b) to the number of red bikes(9).
(54/100)*x = 81 => x = 8100/54=> x = 150;
Answer:
12
Step-by-step explanation:
84/7 is 12, so she was going 12 mph
Answer:
15 students per month
Step-by-step explanation:
The rate of change is calculated as
f(b) = 95 ← number of students in October
f(a) = 65 ← number of students in August
b - a = 2 ← difference in months
Thus
rate of change = = = 15