Answer:
Notebooks: $2.75 each; pens: $1.10 each
Step-by-step explanation:
Let n and p represent the unit cost of notebooks and the unit cost of pens.
Then 3n + 2p = $10.45, and 4n + 6p = $17.60.
Let's use elimination by addition/subtraction to find n and p.
Multiplying the first equation by -3, we get -9n - 6p = -$31.35
and then combine this with the second: 4n + 6p = $17.60
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Then, -5n = -$13.75
Dividing both sides by 55, we get n = $13.75 / 5, so we now know that n = $2.75. Each notebook costs $2.75.
Subbing $2.75 for n in the first equation, we get:
3($2.75) + 2p = $10.45, or
$8.25 + 2p = $10.45
Solving for p, we get p = $2.20 / 2 = $1.10.
Each pen costs $1.10.
Answer:
is the required relationship.
Step-by-step explanation:
We have bee give that the Yusuf earned a total of $180 from drying 12 identically-price pictures at a festival.
That means if we count earning for one picture is:
We need to find the relationship between P and E
Where, P is the price of the picture
And E is the earning.
If we put different values of P we will get the earning for the number of pictures.
Answer:
Ko-op is better
Step-by-step explanation:
1
£2.58/3= 86 p
2
£4.25/5= 85 p
3
£6.72/8= 84 p
Last one Ko-op is better
