Before taking off, a plane travels at a speed of 1/4 km per second. The runway is 5 km. How many seconds does it take the plane to get to the end of the runway? *

20 seconds

Step-by-step explanation:

Given data

Speed= 1/4km/s

Distance= 5km

From the expression

Speed= distance/time

Time= distance/speed

Time= 5/ 1/4

Time= 5* 4/1

Time= 20 seconds

Hence the time is 20 seconds

how am i supposed to answer

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.