Answer:
He sold a total of 37 albums last month.
Step-by-step explanation:
Given,
Total earned money = $644
Base payment = $200
Additional payment for each album = $12
We have to find the number of albums sold by him.
Solution,
Let the number of albums be 'a'.
Total earned money is the sum of base payment and additional payment for each album multiplied with number of albums sold.
So framing in equation form, we get;

Subtracting both side by '200' using subtraction property, we get;

Now dividing both side by '12' using division property, we get;

Hence he sold a total of 37 albums last month.
y = 3
x = -2
These are the solutions after elimination
3:05 for question 10
But i cant really make out number 12.
Answer:
it is 11 years
Step-by-step explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
Answer:
The standard error for the sampling distribution is 1.323.
Step-by-step explanation:
Let <em>X</em> = scores of girls and <em>Y</em> = scores of boys.
The information provided is:

As the population standard deviations are not known, use a pooled standard deviation to estimate the standard error of the sampling distribution.
The formula of pooled standard deviation is:

Compute the standard error for the sampling distribution as follows:

Thus, the standard error for the sampling distribution is 1.323.