9.
the cost of 3 notebooks and 2 pens is $10.45. the cost of 4 notebooks and 6 pens is $17.60.

part a: what is the cost of each item?

part b: miles needs to purchase some new school supplies. for each notebook he buys he will buy 3 pens. how many notebooks can he purchase if he has $22?

show your work and label your answers for both parts of this question.

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

                                     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.

Use me to give the other guy brainliest.

Step-by-step explanation:

A line of best fit can only be drawn if there is strong positive or negative correlation. The line of best fit does not have to go through the origin. The line of best fit shows the trend, but it is only approximate and any readings taken from it will be estimations.

Step-by-step explanation: