SOLUTION: I have the problem that says. A system of equations is shown below: Y=7x-5 Y=3^x Which is a y-value of a solution to the system a: 2 B:3 C:9 D:16 How would I solve

Algebra ->  Radicals -> SOLUTION: I have the problem that says. A system of equations is shown below: Y=7x-5 Y=3^x Which is a y-value of a solution to the system a: 2 B:3 C:9 D:16 How would I solve      Log On


   

Question 693009: I have the problem that says. A system of equations is shown below:

Y=7x-5
Y=3^x
Which is a y-value of a solution to the system
a: 2
B:3
C:9
D:16

How would I solve that??????
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
There is no algebraic way to solve this, but you can plug in each answer choice for x.

Notice that when x = 2 (choice A), y = 3^x becomes y = 3^2 = 9

Also, when x = 2, y = 7x - 5 becomes y = 7(2) - 5 = 14-5 = 9

So when x = 2, y = 9 for both equations.

So the answer is choice C) 9 because they want the y value of the solution.