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:
D
Step-by-step explanation:
8x-5x+3+9=3x+12
combine like terms
What we know: ones = 1, tens -->1x2 = 2, hundreds --> 2x2= 4, thousands --> 4x2 = 8.
8421
squareroot
√1296 = 36
Let the percentage be x.
x% of 1296 = 36
=> 12.96x = 36
=> x = 36/12.96
=> x = 2.78% approx.
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