Let x be the speed of the slower plane, in km/h. Then the faster plane travels at x+40.
[2 hrs at speed x] + [(2 hrs - 1/2 hour) at speed (x+40)] = 2860(2x) + (1.5)(x+40) = 2860 solve for xx=800x+40=840
Plane 1 800 km/h
Plane 2 840 km/h
THE ANSWER OF THIS QUESTION IS 9
Answer:
y=8
Step-by-step explanation:
We need to find the equation for the line.
The first step is to find the slope
We need 2 points (0,2) (2,3)
slope = (y2-y1)/(x2-x1)
= (3-2)/(2-0)
= 1/2
We know the y intercept ( where it crosses the y axis) at 2
Lets use the slope intercept form of the line
y= mx+b
y = 1/2 x+2
If we want to find the value of y when x =12 , substitute the value of x=12
y =1/2 * 12 +2
y = 6+2
y=8
