Question

If 4 pencils cost $1.08, then what is the
cost of 10 pencils

Answer 1

pencils cost 12 cents each, and pens cost 30 cents each.

Explanation:

Let x = the cost of one pencil and y = the cost of one pen. Then we have:

4x+%2B+2y+=+1.08 and

6x+%2B+5y+=+2.22

Let's multiply both sides of the first equation by 3 to get

12x+%2B+6y+=+3.24

And let's multiply both sides of the second equation by 2 to get

12x+%2B+10y+=+4.44

Now let's subtract the first equation from the second:

12x+%2B+10y+-+12x+-+6y+=+4.44+-+3.24

4y+=+1.20

y+=+0.30

Now, let's substitute 0.30 for y in the first equation:

4x+%2B+2%280.30%29+=+1.08

4x+%2B+0.60+=+1.08

Subtract 0.60 from both sides:

4x+%2B+0.60+-0.60+=+1.08+-+0.60

4x+=+0.48

x+=+0.12

So pencils cost 12 cents each, and pens cost 30 cents each.

Answer 2

Answer: 2.7$ for 10 and each costs 0.27

Step-by-step explanation: Divide by 4 and got 0.27 then I multiplied by 10.

Just kept it simple so I dont confuse you.