<em>Greetings from Brasil...</em>
The average for a set of 9 elements will be
(A + B + C + D + E + F + G + H + I) ÷ 9 = 20
Let's make (A + B + C + D + E + F + G + H + I) like S
<em>(I chose S to remember a sum)</em>
Let us think.....
S ÷ 9 = 20
S = 20 × 9
S = 180
So, (A + B + C + D + E + F + G + H + I) = 180
According to the statement, we will include a number (element J) in the sum to obtain a mean of (20 - 4), that is:
<h3>(A + B + C + D + E + F + G + H + I +
J) ÷ 10 = (20 - 4)</h3>
as seen above, (A + B + C + D + E + F + G + H + I) = 180, then
(180 + J) ÷ 10 = 16
(180 + J) = 160
J = 160 - 180
<h2>J = - 20</h2><h2 />
So, including the number - 20 <em>(minus 20)</em> in the original mean we will obtain a new mean whose result will be 16
How much more does the hamster weighs than the mouse is 300 pounds.
Since we have a pet hamster and a pet mouse. We know that the hamster weighs 416 of a pound and the mouse weighs 116 of a pound.
To know how much more the hamster weighs more than the mouse, we take the difference between the weight of the hamster and the weight of the mouse.
Since the weight of the hamster = 416 pounds and the weight of the mouse equals 116 pounds.
<h3>The difference in weight</h3>
The difference in the weight d = weight of hamster - weight of mouse
= 416 pounds - 116 pounds
= 300 pounds.
So, how much more does the hamster weighs than the mouse is 300 pounds.
Learn more about difference here:
brainly.com/question/751620
Answer:
white to grey is 13:12
Step-by-step explanation:
The grid has 25 squares, shade 12 of them grey
Length of rectangle is 1 unit
<u>Solution:
</u>
Given that
Length of a rectangle is width minus 8 units.
Area of rectangle = 9 square units
Need to calculate the length of rectangle.
Let us assume width of rectangle = x
As Length is width minus 8,
Length of the rectangle = x – 8



As given that area of rectangle = 9 square units

On solving above quadratic equation for x, we get

When 
When
As width cannot be negative, so considering x = 9

Hence, Length of rectangle is 1 unit.