Answer:
4 hours
Step-by-step explanation:
25 * 8 = 200
so, 30 * 8 = 240(minutes)
240 / 60 = 4 hours
Hope it helps!
Mark brianliest if I'm right please!
First of all, we compute the points of interest, i.e. the points where the curve cuts the x axis: since the expression is already factored, we have
Which means that the roots are
Next, we can expand the function definition:
In this form, it is much easier to compute the derivative:
If we evaluate the derivative in the points of interest, we have
This means that we are looking for the equations of three lines, of which we know a point and the slope. The equation
is what we need. The three lines are:
This is the tangent at x = -2
This is the tangent at x = 0
This is the tangent at x = 1
Let airspeed of the plane be x mph and wind speed = y mph. Then we have the following system of equations
x - y = 1160 / 4.833 = 240.0166
and
x + y = 1160 / 4 = 290
adding the 2 equations:-
2x = 530.0166
x = 265 mph = airspeed of the plane
y = 290 - 265 = 25 mph = speed of the wind
Answer:
y=3.5x+1.5
Step-by-step explanation:
Move the y to the other side. 7x+3=2y
Divide by 2. 3.5x+1.5=y
Therefore the linear equation is y=3.5x+1.5