Hello,
A cubic polynomial with -2,1,2 as roots is
f(x)=k*(x+2)(x+1)*(x-2)=k(x²-4)(x+1)=k(x^3+x²-4x-4)
Looking the answers ==>k=1
==>Answer A
The equation that represents the relationship between step number and the number of dots is
.
Solution:
Let the number of dots be y.
Step number 0: Number of dots = 1
y = 1
Using exponential rule: 

Step number 1: Number of dots = 5
y = 5

Step number 2: Number of dots = 25
y = 25

Step number 3: Number of dots = 125
y = 125

Note that in step number 0 the power is 0, 1st step power of 5 is 1, 2nd step power of 5 is 2 and the third step power of 5 is 3.
If the process goes on up to n steps, then power of 5 is n.
∴ Step number n:

Number of dots =
.
Hence the equation that represents the relationship between step number and the number of dots is
.
Answer:
I solved question number 8.
a) p= 9
b) p = 17
I solved number 9 but I'm not sure about it
i) 119
ii) 14165
Your answer would be
m=49n/9
n=9m/49
That's what I got. Hope that helps!
Answer Marie will have saved enough in 11 weeks.
In the 6th week, Marie will not have enough money.
Step-by-step explanation: