The graph of the line y = 5x + 7 would cross what number on the y-axis? How do you know?
1 answer:
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Answer:
Step-by-step explanation:
The base function is given as
This graph opens up and has its vertex at the origin.
When we shift the graph of this function down by 9 units, its vertex is now at (0,-9)
The equation of this new graph is
The speed of wind and speed of plane in still air are 23 and 135 km/h respectively.
<u>Step-by-step explanation:</u>
Let the speed of wind and speed of plane in still air are w and p km/h respectively.
The effective speed on onward journey was
................(1)
The effective speed on return journey was
..............(2)
Adding equation (1) and equation (2) we get,
⇒
⇒
⇒
Putting value of in
we get:
⇒
⇒
⇒
Therefore ,The speed of wind and speed of plane in still air are 23 and 135 km/h respectively.