A) Here is a number machine.
Input
Output
n
+ 2
x 3
+ 9
Write down an expression for the output when the input is n.
b)
Here is another number machine.
Input
Output
Х
+4
4x + 5
What operations should go in the boxes to make it work?

rl;

man i just need free points

Step-by-step explanation:

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it happens during combustion and impacts the environment because the plants and trees take in that and it can cause them to die.

here the number -5 is all of the following except a rational number.

step-by-step explanation: