Answer:
The equation is: 
Step-by-step explanation:
Given
Initial = 52000
Rate = 8000 each year
Required
Determine the equation of the graph
The equation can be determined using.
We used minus (-) because, the amount reduces as the student pays.
Let
So, we have:
Substitute values for Initial and Rate
Express as a function:
All of our equations are in slope-intercept form. Slope-intercept form is y=mx+b. m stands for the slope, and b stands for the y-intercept. Our y-intercept is 3. Therefore, we can eliminate the equations that say the y-intercept isn’t b. Next, we can find the slope. We have the points (0, 3) and (3, 2). The formula for slope is y2-y1/x2-x1. 2-3 is -1, 3-0 is 3. Our slope is -1/3. After eliminating those without the y-intercept, we have A or D. We know that the slope is -1/3, so the answer must be D.
Answer: 
Step-by-step explanation:
Let x be the number of computers Grade 3 and grade 4 has and y be the numbers of computers the rest of school has.
Then, x= Grade 3 computers +Grade 4 computers.
And y = Total computers - x
Therefore, The equations can be used to find how many computers the rest of the school has.
Answer:
10% probability that each sample of size 3 is selected
Step-by-step explanation:
Each sample has the same probability of being selected.
There are 10 samples.
This means that the probability of each sample being selected is:
1/10 = 0.1
10% probability that each sample of size 3 is selected
Answer:
-27/7
Step-by-step explanation:
Replace x with 19,
f(19)=3/(19+2) - root(19-3)
=3/21 - root(16)
=1/7 - 4
=1/7 - 28/7
= -27/7
