Which term best describes the object shown in black in the rhombus below?
2 answers:
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Answer:
15 mph
Step-by-step explanation:
Given: Boat took 2 hours to reach Town A going upstream.
Speed of stream= 3 mph
Time taken to reach back home= 1 hours 20 minutes
Lets assume distance covered one side be "d" and speed of boat in still water be "s".
∴ Speed of boat in upstream=
Speed of boat in downstream=
Also converting into fraction of time taken to reach back home.
Remember; 1 hour= 60 minutes
∴ Time taken to reach back home=
Converting time given into fraction=
hence, Time taken to reach back home is
Now forming equation of boat travelling upstream and downstream, considering distance remain constant.
We know,
⇒
Using distributive property of multiplication
⇒
subtracting both side by
⇒
Adding both side by 6
⇒
taking LCD as 3
⇒
Multiplying both side by
⇒
∴s= 15 mph
Hence, 15 mph is the speed of the boat in still water.
The vertex of the parabola is (1, 2), focus of the parabola is (-2, 2), and directrix x = 4.
<h3>What is a parabola?</h3>It is defined as the graph of a quadratic function that has something bowl-shaped.
We have a parabola equation:
The standard form of the parabola:
(h, k) is the vertex of the parabola and (f, k) is the focus.
h = 1, k =2, and f = -2
The directrix is x = 4
Thus, the vertex of the parabola is (1, 2), focus (-2, 2), and directrix x = 4.
Learn more about the parabola here:
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