Answer:
Step-by-step explanation:
Equations:
x + y = 7
x - y = 3
Add and solve for "x":
2x = 10
x = 5
Solve for "y":
x + y = 7
5 + y = 7
y = 2
Answer:
$16,748
Step-by-step explanation:
we know that
The equation of a exponential decay function is equal to

where
y is the value of the car
x is the number of years
a is the initial value
r is the rate of change
In this problem we have

substitute


For x=3 years
substitute

Answer:

Step-by-step explanation:

: Collect like terms
Like terms are those which have same base

: Swap the sides of the equation

: Move 4 to right hand side and change it's sign

: Subtract 4 from 25

: Divide both sides by 3

: Calculate

The value of x is 7
Hope I helped!
Best regards! :D
~TheAnimeGirl
Well, the first one is 2/40=1/20. The 2nd one is 1/39. You multiply these to get 1/780.