Answer:
If there is 1 at the top, then you have 1, then 2, then 3, etc.
total number of oranges equals:
1 + 2 + 3 + ... + 16 + 17 + 18 <-- stop at 18 because this is the number of oranges at the base
You can use the formula:
sum of first n numbers = n*(n + 1)/2
-->
18*19/2 = 9*19 = 171
or you can figure it out (basically derive the above formula):
you have:
1 + 18 = 19
2 + 17 = 19
3 + 16 = 19
...
How many pairs do you have? Well, it's just the number of numbers: 1-18 = 18 numbers (divide by 2) = 9 pairs)
9 pairs of 19 = 9 * 19 = 171
Hope this helps!
Step-by-step explanation:
Answer:
there's a blue crown that shows up when either 2 people already answered or if it's been a few days since only 1 person answered, just click that
Step-by-step explanation:
idk if u know this but apparently u gain points for marking someone brainliest, i read that somewhere but i could be wrong
Answer:
This one ↓↓↓↓↓↓
Step-by-step explanation:
The picture attached is the reflection over the line y = 0
-Chetan K
Hope this helps!
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-Charlie
