While answering questions on Brainly, I ran into a lot of them
that talked about a set being 'closed'. I didn't know what that
means, so do ya know what I did ? I went and looked it up.
I found it, and then I read about it, and now I know what it means !
A set that's 'closed under addition' means that if you add two numbers
in the set, you get another number that's also in the set.
Let's see:
-- 3 is a prime number
-- 5 is a prime number
-- (3+5) = 8
-- 8 is NOT a prime number
-- We added two prime numbers and got a number that is NOT prime.
So the set of prime numbers is NOT closed under addition.
Answer:
165 cm.
Step-by-step explanation:
Let h be the height of Cody on the first day of school last year.
We have been given that Cody was 165 cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.
To find the height of Cody on the first day of school last year, we need to find h such that h plus 10% of h equals 165. We can represent this information in an equation as:
Let us divide both sides of our equation by 1.10.
Therefore, Cody was 150 cm tall on the first day of school last year.
20 or 21 depending on how you do it because 2/7 of 59 is 16.8571429 so i don't know weather you round up or down
For the two figures to be similar, the missing length must be 30.
<h3 /><h3>What is the missing length?</h3>
For the two figures to be similar, the dimension of each figures must be proportional to each other.
Let the missing length be x.
Hence,
x/25 = 24/20
We cross multiply
x × 20 = 24 × 25
x × 20 = 600
x = 600/20
x = 30
Therefore, for the two figures to be similar, the missing length must be 30.
Learn more about similarity and congruence here: brainly.com/question/7888063
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