Answer: There is no solution to the equation ad we have used distributive property to solve the equation.
Step-by-step explanation: The given equation is
PART A:
The solution of the above equation is as follows:
which cannot be TRUE.
So, the equation will not have any solution.
PART B: We have used DISTRIBUTIVE PROPERTY to solve the equation, which states that
for any real numbers a, b and c
(i) a(b + c) = ab + ac,
(ii) (a + b)c = ac + bc.
Thus, there is no solution to the equation ad we have used distributive property to solve the equation.
Answer:
Solution given:
model A printers [a] prints=80books per day
model B printers [b] prints=55books per day
total no of printers =9
no of model A printers be x
and
no of model B printers be [9-x]
According to the question;
ax+(9-x)b=670 books
substituting value of a and b; we get
80x+(9-x)55=670
80x-55x+495=670
25x=670-495=175
x==7
So;
no of model A printers =x=<u>7</u>
no of model B printers =9-x=9-7=<u>2</u>
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Here is dependence between scores and x-values:
where is the mean,
is standard deviation and i changes from 1 to 2.
1. When i=1, then
2. When i=2, then
Now solve the system of equations:
Subtract first equation from the second:
Then
Answer: the mean is 62, the standard deviation is 20.