Answer:
x = 7
Step-by-step explanation:
3x - 4 = 17
Add 4 to cancel out the -4 on left side
3x = 21
Now divide by 3 to solve for x
x = 7
Answer:
This can be found by using the equation:
(160-x)/2 = 51
Step-by-step explanation:
Answer:
Vertex:
Y-intercept:
Step-by-step explanation:
The x-coordinate of the vertex would be and the y-coordinate of the vertex is whatever the output is given the value of x.
Therefore, the x-coordinate of the vertex is
This means the y-coordinate of the vertex is
So, the vertex is
The y-intercept of a function is the y-value at which x=0, or the y-value when the function crosses the y-axis. Therefore, if we plug x=0 into the function, we see that , so our y-intercept is -8 or (0,-8).
I attached a graph below to help you visualize the vertex and y-intercept given the function.
The profit would be 5% of 400, or
, that is, $20 for profit! Not much, I suppose...