

Answer: the summation from n equals one to 5 of quantity negative 1 minus 4 times n
Step-by-step explanation:
5x+8-7x=4x+1
5x+7x-4x=8+1
8x=9
Answer:
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Step-by-step explanation:
3, 9, 15, 21, ...
9-3 = 6; 15-9 = 6; 21-15 = 6 ⇒ d = 6
first term: a = 3
difference: d = 6
so the formula:
and:

Answer:
its 0.5
Step-by-step explanation:

is your equation. Hope this helped! :)