Sharon is rowing a boat upstream. The river is flowing at a speed of 3 miles per hour. Sharon starts rowing at a speed of 8 mile
s per hour, but as she gets tired her speed decreases (at a rate of 1.5 miles per hour, every hour). Graph the equation that fits the description, where y represents Sharon's speed and x represents the time elapsed since the start of her workout.
1 answer:
X represents the elapsed time in hours.y represents the speed in miles per hour.
the equation: y = -1.5 * x + 8
the equation to model this is y = -1.5 * x + 8 - 3
simplify this to get y = -1.5 * x + 5.
She will be traveling at a net speed of 0 miles per hour in 3 and 1/3 hours.
The graph is the attached photo.
the equation: y = -1.5 * x + 8
the equation to model this is y = -1.5 * x + 8 - 3
simplify this to get y = -1.5 * x + 5.
She will be traveling at a net speed of 0 miles per hour in 3 and 1/3 hours.
The graph is the attached photo.
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Answer:
The speed of car B is 50 mile per hour
Step-by-step explanation:
Given as :
The Distance travel by car A = 175 miles
The Distance travel by car B = 125 miles
The Time taken by both car A and B is same = T hours
Let The speed of car B = S mile per hour
So, The speed of car A = ( S + 20 ) mile per hour
Now, Time =
So , For Car A ,
T =
For Car B ,
T =
So, =
Or, 175 × S = 125 × ( S + 20 )
Or, 175 S - 125 S = 125 × 20
Or, 50 S = 2500
∴ S =
I.e S = 50 mph
And S + 20 = 50 + 20 = 70 mph
The speed of car A = 70 mph
The speed of car B = 50 mph
Hence The speed of car B is 50 mile per hour Answer