Step-by-step explanation:
Since x² + kx + (k + 3) is tangent to the x-axis, the quadratic function has a repeated root.
The discriminant is zero, so b² - 4ac = 0.
=> k² - 4(1)(k + 3) = 0
=> k² - 4k - 12 = 0
=> (k - 6)(k + 2) = 0
Hence k = 6 or k = -2.
Answer:
(10-2)/4
Step-by-step explanation:
10-2=8
8/4=2
Answer: 240 minutes
because each hour is 60 minutes and she needs to bake 4 pies that each take 1 hour each.
Answer:
-5
Step-by-step explanation:
Answer:
Step-by-step explanation:
rate of change = change in y/ change in x
The rate of change is 0 if the change in y = 0
0 = 0 / change in x
The graph is a horizontal line since the y values do not change.