For 10 here is the answer and for 9 i’ll reply to my comment
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:
720 = x +133+138+148+95+105
x = 101
The correct answer is B. Multiply input number by 4
Answer:
A. He will have to work 40 hours to buy the headphones
B. 1200 ≤ 10.25x ≤ 2000 where x is # of hrs worked
He can work anywhere between 118 and 196 hours.
Step-by-step explanation:
A. Divide 399.95 by 10.25 to get 39.01 hours. But since you cant work 0.01 of an hour, you have to round up to the next hour
B. You want to make more than or equal to 1200, so put that in the inequality. You want to make less or equal to 2000, so you put that in the inequality. In the middle, you put 10.25 an hour multiplied by the number of hours, which is a variable.
To solve, I made 10.25x = 1200, and x equaled 117.07, which rounds up to 118 hours because you cant work a 0.07 of an hour. 118 hours is the low number of the spectrum.
To solve for the highest number on the spectrum, you do 10.25x = 2000, and x equals 195.12, but since you cant work 0.12 of an hour, it rounds up to 196 hours.
