Find the slope and y-intercept.
2 answers:
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Answer:
3.08 km/h.
Step-by-step explanation:
We know that,
Ali traveled at a speed of s km/h for 2.5 hours.
Let d be the distance and t be the time.
...(1)
On his return journey, he increased his speed by 4 km/h and saved 15 minutes. So, distance is d and times is t-15.
...(2)
From (1) and (2), we get
Put t=40 in (1).
So, t=40 and d=100.
Now,
Total distance = d + d = 100 + 100 = 200
Total time = t + t - 15 = 40 + 40 - 15 = 65
So, the average speed is
Therefore, the average speed is 3.08 km/h.
Answer:
B,5.4 units.
Step-by-step explanation:
Parallelogram RSTU
R(1,1),S(7,0),T(10,4),U(4,5)
slope of RU m=(5-1)/(4-1)=4/3
slope of RS=(0-1)/(7-1)=-1/6=-1/6
slope of ST=(4-0)/(10-7)=4/3
slope of TU=(5-4)/(4-10)=1/(-6)=-1/6
RU||ST
eq. of line RU is
y-y1=m(x-x1)
y-1=4/3(x-1)
3y-3=4x-4
4x-3y-4+3=0
4x-3y-1=0
perpendicular distance of a point (x1,y1) from line ax+by+c=0 is
perpendicular distance of (7,0) from 4x-3y-1=0