Helppp Alberto and Bianca run 50km race. The illustration below the graph of the position of the two runners as a function of time. complete the following sentence based on the graph of the function.
- Early in the race,__ runs faster.
- Alberto maintains a speed of __ km/h during the first hour of the race.
- meanwhile, Bianca’s running speed __
-The first person to cross the finish line is__

- Early in the race,_Alberto_ runs faster.

- Alberto maintains a speed of _20_ km/h during the first hour of the race.

- meanwhile, Bianca’s running speed _Is exponential_

-The first person to cross the finish line is_Bianca_

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

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step-by-step explanation: