Step-by-step explanation:
the solutions for a quadratic equation is
x = (-b ± sqrt(b² - 4ac))/(2a)
in our case
a = 1
b = -4
c = k
x = (4 ± sqrt(16 - 4k))/2 = 2 ± sqrt(4 - k)
x1 = 2 + sqrt(4 - k)
x2 = 2 - sqrt (4 - k)
x1 = 2 + x2
2 + sqrt(4 - k) = 2 + 2 - sqrt(4 - k)
2×sqrt(4 - k) = 2
sqrt(4 - k) = 1
4 - k = 1
k = 4 - 1 = 3
x1 = 3
x2 = 1
Answer:
Please provide a picture.
Step-by-step explanation:
Answer:

Step-by-step explanation:
The line shown is a straight line its equation is of the form.

Where m is the slope and c is the y-intercept.
From the graph, the slope is


The y-intercept from the graph is where the line intersects the y-axis, so c=-1
We substitute the values to get:

Answer:
3.8 seconds to reach the maximum height
Hope I helped have a nice day!:)
Step-by-step explanation: