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cxttiemsp021
02.12.2019 •
Mathematics
The table shows how the number of cars, c, depends on the number people, t. how would you write this as an equation?
c t
2 1
3 4
4 7
5 10
t=3c-5 t=3c+5
t=5c+3 t=5c-3
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Ответ:
t = 3c - 5
Step-by-step explanation:
The relation between c and t is linear as the increase of the value of t is uniform for each unit increase in the value of c.
Now, any two points on the graph of the t = f(c) equation are sufficient to determine the equation.
Let the points are (2,1) and (3,4).
So, using two points formula of straight line we get the equation is
⇒ t - 4 = 3(c - 3)
⇒ t - 4 = 3c - 9
⇒ t = 3c - 5 (Answer)
Ответ:
After 9 years:
7,680
Step-by-step explanation:
4%=0.04
1 year = 12,000 x 0.04=480
9 years= 480 x 9 = 4320
12,000-4320= 7,680