firedemons99
firedemons99 firedemons99
  • 26-05-2017
  • Mathematics
contestada

One car travels 40 km/hr faster than another. While one travels 150 km, the other goes 350 km. Find the speed of the slower car.

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 26-05-2017
so the speeds are s and s+40

distance=speed times time

if we assume the time is the same, and it is t

350=(s+40)(t)
and
150=(s)(t)
so

350=st+40t
150=st
multiply 2nd equation by -1 and add to first

350=st+40t
-150=-st +
200=+0st=40t

200=40t
divide both sides by 40
5=t
so
speed=disatnce/time
s=150/5
s=30

slower car is 30mph
Answer Link

Otras preguntas

Mandy has 32 apples and divides them into 20 uneven pieces, what is the problem with this fraction
whats 20x20-20x100+12-345x65?
As water is heated, the motion of the water molecules will generally 1) decrease 2) increase 3) Remain the same
a group of 4 items have a mean of 62 what would the 5th item have to be to change the mean to 58
add my number 6158886227
Answer 69 all of the parts pleaseeee
When would a bill go to a conference committee in Congress?
The exchange rate is: £1 = $1.54 How many £ would I get for $77
Find the x- and y-intercept of the line. –10x – 6y = 120 A) x-intercept is –6; y-intercept is –10. B) x-intercept is –10; y-intercept is –6. C) x-
Make a sentence out of each word: Conspicuous, rucksack, indigent, intolerance, branded, paralyze, ostracism, parcels, materialistic, and unabashed.