Multiply the second fraction by two; which gets you 5/10 + 2/10 = 7/10
The answer to your question: the ratio of 4 months that have 30 days is ✨3 to 1✨
All you would do is multiply .9 by 20
.9*20=18
90% of 20 is 18
The angle would be 35 degrees (the complement is 90-35 = 55 degrees.) Hope this helps!
Answer:
Step-by-step explanation:
Hello, please consider the following.

So this is divisible by 3.
Now, to prove that this is divisible by 9 = 3*3 we need to prove that
is divisible by 3. We will prove it by induction.
Step 1 - for n = 1
4+17=21= 3*7 this is true
Step 2 - we assume this is true for k so
is divisible by 3
and we check what happens for k+1

is divisible by 3 and
is divisible by 3, by induction hypothesis
So, the sum is divisible by 3.
Step 3 - Conclusion
We just prove that
is divisible by 3 for all positive integers n.
Thanks