Answer:
It will take 4.5hrs to cover the same distance
The constant of variation,k=252
Step by step explanation
Given that,
From the question
Time=4hr
Speed=63km
By substitution we obtain,
Cross multiplying we get,
Now,
speed=56km
Distance Covered=252km
By substitution:
We obtain,
Cross multiply
Divide through by 56
From the formula,
Which means that, speed and time varies inversely.
Let k be variation constant
This implies that
Taken,
Time=4hrs
speed=56km
The answer would be 1/7 in fraction form , and 0.142857 in decimal form. hope this helps!
9514 1404 393
Answer:
y = 1/2x -2
Step-by-step explanation:
The given equation is in slope-intercept form, so you recognize its slope is -2. The perpendicular line will have a slope that is the opposite reciprocal of that, so is -1/-2 = 1/2.
The y-intercept can be found from ...
b = y -mx . . . . . for line of slope m through point (x, y)
b = -1 -(1/2)(2) = -1 -1 = -2
Then the slope-intercept equation of the perpendicular line is ...
y = 1/2x -2
If you form a triangle with the points B and C as two of the points of the right angled triangle then you use Pythagoras to find the length of BC.
3^2+4^2=25
√25 = 5
