Which question? The picture is black
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.
The lengths of one house is not proportional to the lengths of the other house because the structure of the houses are not the same.
<h3>How to depict the information?</h3>
The scale factors can be used to show that the homes are or are not proportional. This can show that the first house doesn't have chimney and rtw second one has.
The role of the surface area take in the building of a house is that it tells us about the sum of its total area covered by the four walls.
The advantage that exist for a house with a large amount of surface area is that it gives more stability.
Learn more about area on:
brainly.com/question/25292087
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Length of the aquarium is 35 yd
Step-by-step explanation:
Step 1: Volume of the aquarium = 210 yd³ given by Volume = length × width × height. Width = 3 yd and Height = 2 yd
Length = Volume/Width × Height
= 210/3 × 2 = 210/6
= 35 yd
