11:19. you would put 11 first to represent the girl and 19 by adding 11 and 8 to represent the total number of students
Answer:
Domain: 
Range: ![(-\infty, 3]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%203%5D)
Decreases over: 
Step-by-step explanation:
Given
--- Missing from the question
Solving (a): The domain
To get the domain, the expression under the square root must not be negative.
In other words:

Solve for x


Hence, the domain is:

To get the range, we plot the values of the domain in the expression.











So, the range is: ![(-\infty, 3]](https://tex.z-dn.net/?f=%28-%5Cinfty%2C%203%5D)
To get the interval where the function increases or not, we simply plot the graph of f(x).
See attachment for graph.
From the attachment, it will be observed that the graph of f(x) continuously decreases from x = -1, and it never increased.
This implies that, the graph decreases over the interval 
The slope is 5/2.
Explained : By using the rise over run method, find two points on the line (-4, -8) and (-2, -3). You can go up 5 from (-4, -8) and to the right twice taking you to (-2, -3). Convert to a fraction. 5 up, 2 right = 5/2.
Answer:
$150.00
Step-by-step explanation:
$5 times 25 cakes = $125.00 plus the extra $25.00 in tips = $150.00
Hope this helped you :)
There are 4 blue marbles
There are 2 black marbles
There are 3 red marbles
There are a total of 9 marbles
You minus the black marbles from the total
9-2=7
If there are 7 non black marbles then the ratio is 7:9
7:9 is the probability that you won't get a black marble