Four because 90+90+90+90 = 360, which is the angle f a circle
One-third is one out of three pieces of a whole.
I hope this helps, please Brainliest me, and have a great day! :D
Answer:
I suggest using the website called Cymath https://www.cymath.com/
it allows u to type in problems like this and shows you how to do it
Hope this helped!! Have a good day c;
Step-by-step explanation:
Dan started with 69 cards
Step-by-step explanation:
Let x be the initial number of cards
Then
According to "Dan bought 7 new baseball trading cards to add to his collection"

The next day his dog ate half of his collection.

There are now only 38 cards left.

Multiplying both sides by 2

Subtracting 7 from both sides

Hence,
Dan started with 69 cards
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