Answer:
The expression y = 4.85g + 0.83s can be used to determine the total cost.
Step-by-step explanation:
Given that:
Cost per pound of granola bars = $4.85
Cost per pound of sugar = $0.83
Let,
y be the total cost.
According to given statement;
y = 4.85g + 0.83s
Hence,
The expression y = 4.85g + 0.83s can be used to determine the total cost.
Answer:

Step-by-step explanation:
Let the total purchase be given as 'p' dollars.
Given:
Price of a notebook = $5
Price of a pen = $1.50
Number of pens purchased = 'x'
Number of notebooks purchased = 1
So, cost of 'x' pens can be obtained using unitary method and is given as the product of price per pen and number of pens.
So, price of 'x' pens = Price per pen
Number of pens
Price of 'x' pens = 
Now, total purchase price will be equal to the sum of the price of a notebook and price of 'x' pens.
Therefore, the total purchase price is given as:
Total price = 1 notebook price + 'x' pens price
⇒ 
A would equal 4 because you would first convert the mixed numbers into improper fractions, then move the constant to the right, and finally add the factions
a-2(1/2)=1(1/2)
a-(5/2)=(3/2)
a=(3/2)+(5/2)
a=4