9. What is the value to the solution for the system of equations y = -5X-9 and y = 2x + 5.
1 answer:
You might be interested in
Let
x-------> the number of hours
y------> the temperature in degrees Fahrenheit
we know that
For
For
The domain of the function is the interval---------->
The range of the function is the interval---------->
therefore
<u>the answer is</u>
The domain is all real numbers 0 through 30
Answer:
(-18,9)
Step-by-step explanation (work shown in picture attached):
1) The first step in solving by substitution is to isolate the y-term in one of the equations if it is not already isolated. Isolate y in the first equation by dividing both sides by -2. This leaves us with the equation
2) Now, substitute for the y in the second equation. Simplify and isolate x. (You can multiply everything by -2 to get rid of the fraction.) This leaves us with x = -18.
3) We've found the x-value of the solution, -18. Now, substitute -18 for x back into one of the original equations (I chose the first one because it was simple) and isolate y. This gives us y = 9. Thus, in point form, the answer is (-18,9).
