20068513
24.09.2019 •
Mathematics
In rectangle abcd , ac=3x+15 and bd=4x-5.find the length of ac
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Ответ:
AC= 75
Step-by-step explanation:
Set the equations equal to each other.Then solve for x.
Ответ:
315 km
Step-by-step explanation:
If the bus travels at constant speed, then the slope of the distance versus time graph can be calculated by using any two points from this table.
Let's use the points (0.5, 42) and (4.5, 378):
as we move from the first point to the second, t increases by 4 and y increases by 336. Thus, the slope of this graph is
m = rise / run = 336 km / 4 hr = 84 km/hr
then distance traveled = speed times time, or
distance traveled = (84 km/hr)t, where t is the elapsed time.
In 6 hours the bus would travel
( 84 km/hr )(6 hr) = 504 km, or approx. 315 mi