use this formula Sn=n/2[2a+(n-1)d]
here,d=a2-a1 and n= no. Of terms
Step-by-step explanation:
S8=8/2[2(1)+(8-1)2]
S8=64
The answer to 25. is A
and
to 26. is C (I'm not sure on this one but i think this is the answer)
Answer:
2
Step-by-step explanation:
(-7)^2 - 4*3 *(-2) = 49 + 24 >0
discriminant is positive so 2 real roots
If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).
Answer:
right angel triangle means one of the three angel is 90
also it is given that two sides are equal
there for it is an isoselas triangle means other two triangles are equal
let the other two angels be x then
then 90 + x + x = 180
2x = 180 - 90
x = 90 ÷2
× = 45
prof. 90 + 45 + 45 = 180
Step-by-step explanation:
hope it helped u buddy
