6 pencils cost 1.68 3 pencils and 1 rubber cost q.09 what is the cost of one rubber​

1 rubber cost is 0.59

Step-by-step explanation:

The computation of the cost of one rubber is shown below:

Given that

6 pencil cost = 1.68

3 pencils and 1 rubber cost = 1.09

based on the above information

one pencil cost is

= 1.68 ÷ 3

= 0.56

Now

3(0.56) + 1 rubber = 1.09

So, 1 rubber cost is 0.59

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

10010010001010010101001001010010100101010010101010010010101010110010001011010010010001

step-by-step explanation: