Pre college need help number 3

B) No solution

Step-by-step explanation:

Adding two numbers together for a signle result cannot result in two different numbers. Example.

-2 + 3 = 1

-2 + 3 ≠ 4

You can also use math. Using substitution will result in simplyfying -y and y, creating 0 with no variable to solve for.

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- Heather

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  

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: