Bill enters a 30 kilometer race. He runs the first 20km at a speed of x kilometers per hour and the last 10 km at (x-5) kph. His total time for the race was 4 hours a.) Write down an equation in terms of x and solve it.
b.) What are his speeds for the two parts of the run?

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

sorry man i accidentally pressed yes my bad

step-by-step explanation:

i believe that the slope of the line is -5

step-by-step explanation: