Answer:
7.5 seconds
Step-by-step explanation:

Thus, the time required for the object to return to its point of departure is 7.5 seconds.
The value of 'k' in the quadratic Equation
having one rational solution is k is 8.
<h3>
What is a Quadratic Equation?</h3>
- Quadratic equations are the polynomial equations of degree 2 in one variable of the type
where a, b, c, ∈ R and a ≠ 0. - The standard form of a quadratic equation is
.
Here, the given equation is 
By comparing the given equation with the standard form of the quadratic equation we get,
a = 4
b = k
c = 4
The given quadratic is having one rational solution, which means 
Therefore,

Therefore, the value of k is 8.
Learn more about the quadratic equation is brainly.com/question/8649555
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Answer:
1/3
Step-by-step explanation:
Graph the line using the slope and y-intercept, or two points.
I used desmos.
Answer:
the first number in the ordered pair is on the x axis, so find that number on the x axis, then, the second number is on the y axis, so find that number on the y axis, then, imagine a line that runs up and down on the x axis number, and a line that runs side to side on the y axis number, and were those lines would meet is were you need to put a dot on the coordinate plane
Step-by-step explanation:
Answer:
9/15 = 0.6 = 60%
Step-by-step explanation: