Answer:
n = 9
Step-by-step explanation:
20 + 18 + ... + 6 + 4
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a = 20 ; d = -2 ; n = ?
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4 = 20 + (n-1)(-2)
-16 = (n-1)(-2)
---------
n-1 = 8
n = 9
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S(9) = (9/2)(20+4)
S(9) = 4.5*24
S(9) = 108
0.8333 repeated is 5/6 in decimal form.
3/4 because tht equation is in the form of y=mx+b and M stands for slope and In waht u wrote The slope is 3/4
