Answer:
40
Step-by-step explanation:
5*4*2
The answer is 168 logs.
1st row: 15 logs
2nd row: 18 logs
3rd row: 21 logs
(so, each row has 3 more logs)
4th row: 24 logs
5th row: 27 logs
6th row: 30 logs
7th row: 33 logs
The sum of logs from each row is: 15 + 18 + 21 + 24 + 27 + 30 + 33 = 168 logs

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Step(1)
To find q(a) we just need to put a instead of x in q(x) function.
Let's do it...

Multiply sides by -2 :


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Step (2)
To find q(a+1) we just need to put a+1 instead of x in q(x) function.
Let's do it...



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Step (3)



And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️
8:15 or 8 to 15 would be the ratio because you compare 8 quarters to 15 coins.