Answer:
10
Step-by-step explanation:
A rational number is 9.
When you multiply 0.9x10 you get the sum of 9.
9 is a rational number because it is a perfect square and an integer.
I hope this helps you understand :)
Answer:
r = 4/5
Step-by-step explanation:
Formula
Sum of an infinite geometric series = a / (1 - r)
Givens
Sum = 5*a
a = a
r = ?
Solution
5a = a/(1 - r) Divide both sides by a
5a/a = a / (a * (1 - r) The a's on the right cancel
5 = 1 / (1 - r) Multiply both sides by 1 - r
5*(1 - r) = 1*(1 - r)/(1 - r) The 1 - r s on the right cancel
5*(1 - r) = 1 Remove the brackets.
5 - 5r = 1 Subtract 5 from both sides
5-5 - 5r = 1 - 5 Combine
-5r = - 4 Divide by - 5
r = 4/5
Answer:
-28
Step-by-step explanation:
2xy=2(7)(-2)=14(-2)=-28
Answer: the two circles are the same but the big one is just 5 times the small circle.
Step-by-step explanation:
So basically there is an increase by 15% and 35% of $35.
You find out:
5 % of $ 35 = 1.75
10% of $35 = 3.5
15% of $35 = 5.25
30% of $35 = 10.5
35% of $ 35 = 11.25
5.25 + 11.25 = $16.5
$35 + $16.5 = $51.5
The answer is $51.50
I hope this was helpful and the brainliest answer :p
