Answer:
$101
Step-by-step explanation:
Given
![y = 8.50x + 33](https://tex.z-dn.net/?f=y%20%3D%208.50x%20%2B%2033)
age above 40
Required
Insurance for 48 years old
First, we solve for x
![x = 48 - 40](https://tex.z-dn.net/?f=x%20%3D%2048%20-%2040)
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
So, we have:
![y = 8.50x + 33](https://tex.z-dn.net/?f=y%20%3D%208.50x%20%2B%2033)
![y = 8.50 * 8 + 33](https://tex.z-dn.net/?f=y%20%3D%208.50%20%2A%208%20%2B%2033)
![y = 68 + 33](https://tex.z-dn.net/?f=y%20%3D%2068%20%2B%2033)
![y = 101](https://tex.z-dn.net/?f=y%20%3D%20101)
So 0.5 ft per day is the same as 0.5 ft per 24 hours. This equals 0.5/24 ft an hour. 0.5 ft /24=0,02083 ft. Simple conversion yields 0.02083*12=0.25. So the vine can grow by .25 inches per hour.
The x-intercept is the point where the line intersects the x-axis which means that it is the value of x when y in the equation is set to be equal to zero. In the equation of the line given, setting the y value to zero will result to an x value of -1/2. Therefore, the x-intercept would be -1/2.
Step 3: the student missed +4 in the equation while adding both equation