ria5 ria5
  • 23-08-2015
  • Mathematics
contestada

D=20mi, r=30 mi/h, what is the time

Respuesta :

Аноним Аноним
  • 23-08-2015
[tex]v=\frac{s}{t}\\\\v=30\ mph\\\\s=20\ mi\\\\subtitute\\\\30=\frac{20}{t}\to\frac{30}{1}=\frac{20}{t}\ \ \ |cross\ multiply\\\\(30)(t)=(1)(20)\\\\30t=20\ \ \ \ |divide\ both\ sides\ by\ 30\\\\t=\frac{20}{30}\to \huge\boxed{t=\frac{2}{3}\ (h)}[/tex]

[tex]1\ h=60\ min\\\\therefore\\\\\frac{2}{3}\ h=\frac{2}{3}\cdot60\ min=2\cdot20\ min=\huge\boxed{40\ min}[/tex]
Answer Link

Otras preguntas

How do you solve x-8= -(12/x)
Solve for x: 2 over 5 (x - 4) = 2x
HELP!?! PLEASE!! Which pair of fractions shows 7/9 and 5/12 correctly converted with their least common denominator?A.28/36 and 15/36B.34/36 and 29/36C. 56/72
why might a wide range of species be endangered by the pollution of an estuary?
What is the importance of high membrane surface area to cellular function?
Marcia has 412 bouquets of flower for centerpieces .she uses 8 flowers for each centerpiece . How Manu centerpieces can she make
What is the value of x in the equation 4x + 8y = 40, when y = 0.8?
Which of the following mainland countries of Southeast Asia was never a European colony? A. Thailand B. Laos C. Burma (Myanmar) D. Cambodia
2/(x^2)=4/x+1can any one solve this for me please
How would I reduce 540/600 using prime factorization?