Answer: $70 per year.
Step-by-step explanation:
Let's say that x is the number of years that has passed and y is how much the stamp is worth.
So we know that in zero years the stamp was worth $420 because that is the time Sheri gave her brother Sam the stamp. That could bring up the coordinates (0,420) .
Now we know that in 8 years it was worth $980 and that could be the coordinates (8,980)
To find the rate of change we need to find the different between the y value and divide it by the difference in the x values.
420 - 980 = -560
0-8 = -8
-560/-8 = 70
The rate of change is 70 which means that it grew by $70 every year.
Answer:
1/8
Step-by-step explanation:
Answer:
9 3/8
Step-by-step explanation:
or 75/8
Answer:
y=-x,A
Step-by-step explanation:
When we input -5 in for x, we get 5
When we input 7 in for x, we get -7
Answer:
$75.38
Step-by-step explanation:
12 : 100 = x : 79.87
x = 79.87 * 12 / 100
x = 0.7987 * 12
x = 9.5844 = discount
Price = 79.87 - 9.5844 = $ 70.2856
7.25 : 100 = x : 70.2856
x = 70.2856 * 7.25 / 100
x = 70.2856 * 0.0725 = 5.095706 = taxes
final price = 5.095706 + 70.2856 = 75.381306
