Answer:
D.
Step-by-step explanation:
20(2^6) = 1280
Answer:
3,5
Step-by-step explanation:
This is an arithmetic series,
so
S(n) = (n/2)*(a(1)+a(n))
S(25) = (25/2)*(a(1)+a(25))
n=25
a(n) = 3n-2
a(1)= 3*1-2=1
a(1)=1
a(25) = 3*25-2=75-2=73
a(25)=73
S(25) = (25/2)*(1+73)=(25/2)*74=925
S(25)=925
Answer : 925
Answer:x = negative 4
Step-by-step explanation:
The given equation is expressed as
1/4 × x - 1/8 = 7/8 + 1/2 × x
x/4 - 1/8 = 7/8 + x/2
First step is to find the lowest common multiple of the left hand side of the equation and the right hand side of the equation. Then, we would multiply both sides of the equation by the lowest common multiple. The lowest common multiple is 8. Therefore
x/4 × 8 - 1/8 × 8 = 7/8 × 8 + x/2 × 8
2x - 1 = 7 + 4x
7 + 4x = 2x - 1
Subtracting 2x and 7 from the left hand side of the equation and the right hand side of the equation, it becomes
7 - 7 + 4x - 2x = 2x - 2x - 1 - 7
2x = - 8
x = - 8/2 = - 4