We have equation:
t=20x+31
x is number of years after 1997.
To calculate number of laptops in 2005:
x=2005-1997
x=8
t=20*8+31
t=160+31
t=191
In year 2005 school had 191 laptops.
Answer: Not sure, but Ill go with C.
Step-by-step explanation:
Answer: He read 40% of the total time.
Step-by-step explanation:
As per given,
Total time he spent = 2 +1+2 = 5 hours
Number of hours he spent on reading = 2 hours
The percent of the total time he read = 

i.e. The percent of the total time he read = 40%
Hence, he read 40% of the total time.
Answer:
18
Step-by-step explanation:
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Just todo the test so its tje ansiedad
Answer:

Step-by-step explanation:
Trend line passes through the points (6,12) and (4,16).
Find the slope of the line:

Write the equation of the line in the form
where the slope 

This line passes through the point (6,12), then its coordinates satisfy the equation:
