Answer:Incorrect.
For example, two equations with same y intercept.
y = 2x + 3
y = 5x + 3
This system has only one solution.
Another example,
y = x + 7
y = x + 7
This system has infinitely many solutions.
So she is not correct because of the first example.
Step-by-step explanation:
Answer:
A. 
B. The y intercept is 4.8
Step-by-step explanation:
Given
Solving (a): Write as a function.
To do this, we simply substitute f(n) for 
becomes
Open Bracket
Collect Like Terms
B. The y intercept.
To get the y intercept, we set n to 0
i.e
Hence, the y intercept is 4.8
x= -623/18
Hope it helps for you,buddy!
Answer:
42.25 feet
Step-by-step explanation:
The height function is a parabola. The maximum value of a negative parabola is at the vertex, which can be found with:
x = -b/2a
where a and b are the coefficients in y = ax² + bx + c.
Here, we have y = -16t² + 52t. So a = -16 and b = 52. The vertex is at:
t = -52 / (2×-16)
t = 13/8
Evaluating the function:
h(13/8) = -16(13/8)² + 52(13/8)
h(13/8) = -169/4 + 169/2
h(13/8) = 169/4
h(13/8) = 42.25
