The of the first multiples of 21 is 21, 42, 63, 84, 105
12
Step-by-step explanation:
Quotient rule,

Do this,
a^(n-3)=a^9
Since the exponents have to be the same, this turned into a simple one step equation:
n-3=9
+3 +3
**n = 12, so the final answer is 12.
Answer:
Sienna has 5 3/4 pounds of grapes. She eats 1/8 pound and gives 2 1/2 pounds to her brother. How many pounds of grapes does Sienna have left?
Answer
5.0/5
2
The pounds of grapes left with seinna is 3.125 or pounds
Solution:
Given that Sienna has pounds of grapes
She eats pound and gives pounds to her brother
To find: pounds of grapes left with seinna
We can find the pounds of grapes left with seinna by subtracting the pounds of grapes she ate and pounds of grapes she gave to brother from the total pounds of grapes she had
Pounds of grapes left with seinna = total pounds of grapes - pounds of grapes she ate - pounds of grapes she gave to brother
Substituting the values we get,
Thus the pounds of grapes left with seinna is 3.125 or poundsStep-by-step explanation: