sillixmadi24x7oqxqoa sillixmadi24x7oqxqoa

15-07-2017
Mathematics

contestada

randy made a business trip of 204 miles. he averaged 52 mph for the first part of the trip and 50 mph for the second part. if the trip took 4 hours, how long did he travel at each rate?

Respuesta :

musiclover10045 musiclover10045

15-07-2017

x+y = 4

x=4-y

52x+50y=204

52(4-y)+50y=204

208-52y+50y=204

208-2y=204

-2y=-4

y=2

x= 4-2=2

check 52*2=104

50*2 = 100

104+100=204

so he traveled 2 hours at both 50 and 52 mph

Answer Link

Otras preguntas

Which of the following are ways that a character might be similar to a parallel character? Select all that apply. appearance values social status attitude motiv

The fordney-mccumber act of 1922 helped boost the american economy by

If you combine solutions of metal cations with various anion solutions. Based on what you know about soubility rules for which of the following combinations do

Read this passage from the National Oceanic and Atmospheric Administration, or NOAA. What should you NOT infer from these sentences? If a fringing reef forms ar

Donald is seventy years old. For the past few years, he has developed a memory loss that is getting worse, and his personality has become very erratic. His doct

Which of the following describes a reaction that reaches equilibrium?

which of the following is a trinomial with a constant term.a: x+4yb: x^3c: x^4+3y^2+2yd: y^5+13x+12

1300 at 6% for seven years

Which of the following is the best example of a check on presidential power? A. the Supreme Court finding a law unconstitutional B. the Senate voting to pass

what's the equivalent of the expression -2 (-x +5y ) + 3 (2x - 6y)?