SchoolEqualsSadLife SchoolEqualsSadLife

02-02-2017
Mathematics

contestada

To get to work, you drive for 20 minutes at 30 mph, and walk 10 more minutes at 3 mph. What was your average speed?

a) 16.5 mph
b) 20 mph
c) 21 mph
d) 23 mph

Respuesta :

mdarrow01 mdarrow01

15-02-2017

Note D = r(t)
20min = 1/3 hr and 10min = 1/6 hr

(1/3hr)30mph + (1/6hr)3mph = 10.5 mi, the total distance traveled.

total distance / total time = average speed = 10.5/(1/3 + 1/6) = 10.5/(2/6 + 1/6)
10.5mi/.5hr = 21mph

Hope This Helps

Answer Link

Otras preguntas

how many countries did britain colonise

what effect did the eastern front have on world war I

C. ax + bx = 10 I need help, I am going into HS and don't understand how to solve this. This is summer HW

Can someone help me in this plssss I really need it

Please answer the attached question by selecting of the the given answers.

(6^2m+2 × 6^-2m+2 / 6^2 )^1/2

How much of a threat to global stability is Vladimir Putin? How should not just the US but Europe respond to his threat?

Javier and his study group designed a word problem, equation, table, and graph that were all supposed to represent the same information, as shown below. Word pr

PLEASE HELP!!! WILL MARK BRAINLIEST!!!Spencer is asked to factor the polynomial 256x^4 y^2-y^2completely over the integers. His work is shown below.256x^(4)y^(2

write a letter about brother/sister suggest not to eat junk food