Answer: speed of the car is 88 miles per hour
the speed of the motorcycle is 78 miles per hour
Step-by-step explanation:
Number of miles travelled by car = 312
Number of miles travelled by motorcycle = 272
Let x = speed of the car
Let y = speed of the motorcycle
If the car's speed is 10mph more than the motorcycle's, it means
x = y + 10 - - -- - - 1
Time taken for car to travel 312 miles is distance /speed = 312/x
Time taken for motorcycle to travel 272 miles is distance /speed = 272/y
The car travels 312 miles in the same time that a motorcycle traveled 272.
This means
312/x = 272/y
312y = 272x
y = 272x/312
Substituting y = 272x/312 into equation 1, it becomes
x = 272x/312 + 10
312x = 272x + 3120
312x-272x = 3120
40x = 3120
x = 3120/40 = 78 miles per hour
x = y + 10 = y + 78
x = 88 miles per hour
Answer:
y=2/3 x+2
Step-by-step explanation:
The equation of a linear graph is given as
y=mx+c
m is the slope of the line while c is the y intercept
As shown from the graph, the y-intercept is 2
The slope can be calculated by diving the height by the length:
2/3
y=2/3 x+2
The answer is the third one :)
-3y -21 +8 = -28
-3y -13 = -28
-3y = -15
y= 5
Answer: It should be an 8th grade level
(sorry if i'm wrong)
:(
