The sum of two consecutive even integers is -134 . What are the two numbers?
2 answers:
If we let x equal one of the numbers, and we let y equal the other number, we can define the equation as 
. Since we know, though, that the numbers are even and consecutive integers, we can say that 
. We can then substitute our new value of y into the first equation which becomes 
. It can then be simplified as follows:
.
We have now solved for x, but we still need to know what y is, so we need the equation which we can evaluate and solve for y.
Now we have the two consecutive even integers whose sum is -134. They are -68 and -66.
We have now solved for x, but we still need to know what y is, so we need the equation
Now we have the two consecutive even integers whose sum is -134. They are -68 and -66.
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Answer:
<em>Student 2 is incorrect because he didn't use the formula properly</em>
Step-by-step explanation:
The exponential function is often used to model natural growing or decaying processes, where the change is proportional to the actual quantity.
An exponential decaying function is expressed as:
Where:
C(t) is the actual value of the function at time t
Co is the initial value of C at t=0
r is the decaying rate, expressed in decimal
The initial value of the item is Co=$1000, the rate of decay is r=40%=0.4, and the time is t=3 years.
Substituting into the formula:
C(3)=$216
Student 2 is incorrect because he didn't use the formula properly