Answer:
(a) 10×8
(b) 31×9
Step-by-step explanation:
We have given that
(a) 81 - 1
We have to write this in form of product of two integers
We know the algebraic equation 
As 81 -1 can be written as 
So 
(b) We have given 400 - 121
We have to write this in form of product of two integers
We know the algebraic equation
As 81 -1 can be written as 
So 
Answer:
A
Step-by-step explanation:
(x^(2)-16)/((x-16)(x+4))=
[(x+4)(x-4)]/(x-16)(x+4)=
x-4/x-16
Function rule: a = 20w + 115
Slope: 20
Initial value: 115
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We start with $115 in the account. This is the initial value. Each week we add on $20.
So we add $20 for 1 week
We add 2*20 = $40 for 2 weeks
We add 3*20 = $60 for 3 weeks
etc etc
In general, we add 20*w dollars for w weeks onto 115 to get a = 20w+115
The slope is 20 because this is the rate of change, ie how fast the account grows. It grows 20 dollars per week.
Answer: she has $20 left now.
Step-by-step explanation:
The total amount of money that Kathryn had yesterday was 105 dollars.
She first spent 1/3 of it at the mall. This means that the amount of money that she spent at the mall is
1/3 × 105 = $35
The amount left after her shopping would be 105 - 35 = $70
Later, she went to the movies and spent 5/7 of what was left after her shopping. This means that the amount of money that she spent at the movies is
5/7 × 70 = $50
The amount that she has left now is
70 - 50 = $20
Y = 9 when x= -3
y= 6 when x = -6
