Answer:
let the first term of an A.P. is 'a' and common difference 'd'
∴ 8th term = sum of the first 8 terms
a8 = S
a + 7d = 8/2(2a + (8 - 1)d)
a + 7d = 8/2(2a + 7d)
2a + 14d = 16a + 56d
16a + 56d - (2a + 14d) = 0
14a + 52d = 0
divide eq. by 14 we get ,
a + 3d = 0
and a + 3d = a4 = 0
Answer:
18/25
Step-by-step explanation:
72% = 72/100
72/100 simplified
=18/25
Answer:
-71
Step-by-step explanation:
let 'n' = a number
2(143 + 2n) = 0n + 2
2(143 + 2n) = 2
143 + 2n = 1
2n = -142
n = -71
Example: 2x + 6 < -8
There's 2 steps to solve this one.
2x + 6 < -8
Subtract 6 from both sides
2x < -14
Divide both sides by 2
x< -7
Answer:

Step-by-step explanation:

Side z is the adjacent, since it is next to the angle you are solving for.
Side x is the opposite, since it is opposite the angle you are solving for.
The side measuring 14 is the hypotenuse, since it is across from the right angle.
