Speed = distance/time
distance = speed * time
let x = time covered by running
15 = run distance + walk distance
15 = 9(x) + 3(3-x)
15 = 9x + 9 - 3x
15 - 9 = 6x
6 = 6x
x = 1 hour
Therefore:
Running distance = speed * time
RD = 9km/hr * 1 hr
RD = 9km
Answer:
45 seconds
Step-by-step explanation:.
Answer:
is there a graph
Step-by-step explanation:
For the first one is D
The second one is A
The third one should be B, it makes the most sence
A-2+3= -2
⇒ a+ (-2+3)= -2 (combine like terms)
⇒ a+ 1= -2
⇒ a= -2-1
⇒ a= -3
Final answer: a=-3~
