Fist you would distribute then simplify the radical.
Answer:
Option 3) y = -10x²
Step-by-step explanation:
If a quadratic function is in the form of
y = ax² + bx + c
Then coefficient 'a' decides how much narrow will be the graph.
Now from the given options, option C (y = -10x²) will be the narrowest graph.
Option 3) y = -10x²
<span>A motorboat
travels 222 km in 6 hours going upstream.
Rate = distance/time = 222/6 = 37 km/hr
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It travels 390 km going downstream in the same amount of time.
Rate = distance/time = 390/6 = 65 km/hr
---------
What is the rate of the boat in still water and what is the rate of the
current?
Equations:
Upstream: b-c = 37 km/hr
Downstrm: b+c = 65 km/hr</span>
<span>Add and solve
for "b":
(2)b = 102 km/hr
b = 51 km/hr (speed of the boat in still water)
-----
Solve for "c":
b+c = 65
51 + c = 65
c = 14 km/hr (speed of the current)</span>
Answer:
i think the answer is 18.15
Step-by-step explanation:
