Answer:
S=157
Step-by-step explanation:
an= a1+(n-1)d
a2=80+(2-1)(-3)
a2=80-3
a2=77
Sn=(a1+an)*n/2
S2=(80+a2)*2/2
S2=(80+77)*1
S2=157
Answer:
Step-by-step explanation:
True
7 X 9 X 6 = 378
Equation for Line
y = -1/2 x - 2
Answer:
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