Answer:
we need to prove : for every integer n>1, the number
is a multiple of 5.
1) check divisibility for n=1,
(divisible)
2) Assume that
is divisible by 5, 
3) Induction,



Now, 



Take out the common factor,
(divisible by 5)
add both the sides by f(k)

We have proved that difference between
and
is divisible by 5.
so, our assumption in step 2 is correct.
Since
is divisible by 5, then
must be divisible by 5 since we are taking the sum of 2 terms that are divisible by 5.
Therefore, for every integer n>1, the number
is a multiple of 5.
Answer:
multiple choice is worth 2
short response is worth 4
Step-by-step explanation:
23x + 10y = 86
28x + 5y = 76
solve by elimination
multiply the top by -1 and the bottom by 2
-23x + -10y = -86
56x + 10y = 152
add them
33x = 66
x = 2
with x = 2 plug x into one of the equations
23x + 10y = 86
23(2) + 10y = 86
46 + 10y = 86
10y = 40
y = 4
x = 2 and y = 4 so
multiple choice is worth 2
short response is worth 4
Answer:
$13.45
Step-by-step explanation:
Divide $107.60 by 8
6 =2(x+8)-5x
6 =2x+16-5x
6-16=2x-5x
-10=-3x
10=3x
x=10/3
hence proved
Answer:
The answer to your question is: y = -1/9 x - 40/9
Step-by-step explanation:
Data
A (-4 , -4)
B (5, -5)
Formula
m = (y2 - y1) / (x2 - x1)
y = mx + b
(y - y1) = m(x - x1=
Process
m = (-5 + 4) / (5 + 4)
m = -1 / 9
( y +4) = -1/9 (x + 4)
y + 4 = -1/9 x - 4/9
y = -1/9 x - 4/9 - 4
y = -1/9 x - 4/9 - 36/9
y = -1/9 x - 40/9