Answer:
answer of 2a)
He started with $24 and spent $16. Let a represent his account balance after he bought the notebook and pens. Then
24–16=a
His new account balance is $8.
He has $8 in his account and then he deposited b dollars. His account balance is now $28. Then
8+b=28
His deposited $20 in his account.
He has $28 and spent $34. Let c represent his account balance after he bought the book. Then
28–34=c
His new account balance is -$6.
He started with an account balance of -$6 and paid the debt off so his account balance is 0. If d is the amount money he deposited to pay off his debt, then
−6+d=0
He deposited $6.
answer of 2b)
If he spends more than he has in his account, then we are subtracting a bigger number from a smaller number, and the result is negative. ... The opposite of a positive number is a negative number, so it makes sense to represent his account balance with a negative number when he owes money to the bookstore.
please give me brainliest:))
Answer:
Step-by-step explanation:
Parts of the question are missing.
y = a(x-h)² + k is a vertical parabola.
If a is positive, the parabola opens upwards.
If a is negative, the parabola opens downwards.
The vertex is at (h, k)
Answer:
I think its XY=15.
Step-by-step explanation:
The explicit formula is 
and the sum of the first 25 terms is approximately 512
<h3>The explicit formula</h3>
The given parameters are:
Set n = 0
Substitute 256 for a0
This means that the common ratio is 0.5.
The explicit formula is then represented as:
This gives
<h3>The sum of the first 25 terms</h3>
This is calculated using:
This gives
Evaluate
Hence, the sum of the first 25 terms is approximately 512
Read more about geometric series at:
brainly.com/question/24643676
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