Tuesday
September 30, 2014

Homework Help: distance

Posted by Shawn11 on Wednesday, August 1, 2007 at 3:02pm.

An executive drove from home at an average rate of speed of 30 mph to an airport where a helicopter was waiting. The executive boarded the helicopter and flew to the corporate offices at an average speed of 60 mph. The entire distance was 150 miles. The entire trip took 3 hours. What is the distance from the airport to the corporate offices?

Distance = rate x time

let the time by helicopter be x hrs, then the time he drove would be 3-x hrs

Distance in helicopter = 60x
distance driven = 30(3-x)

so 60x + 30(3-x) = 150

solve for x, then sub into 60x

tell me what you got, I got 120


An instructor asked his/her class to evaluate the expression 1/2x for x = 5. Some students gave 0.1 for an answer while others gave 2.5. Which answer is correct?


Note: I cam eup with 0.15?

The way you wrote it as 1/2x, one has to follow the order of operation and it would be 12*x which is then 12*5 = 2.5

to obtain .1 you would have written it as
1/(2x)

I don't see how you could obtain .15 as an answer.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math70 - An executive drove from home at an average speed of 30 mph to an ...
physics - An attack helicopter is equipped with a 20- mm cannon that fires 105 g...
Algebra - A coast guard helicopter receives a distress signal from a boat. the ...
physics - A package is dropped at time t=0 from a helicopter S that is ...
physics - A package is dropped from a helicopter that is descending steadily at ...
Physics - Hi I really need this question answer as a check: a helicopter holding...
math - A helicopter is 400 miles directly north of Ghana and is flying at 20 ...
physics - A helicopter is flying horizontally at 8.2 m/s and an altitude of 17 m...
Physics - A helicopter is flying horizontally at 7.5 m/s and an altitude of 18 m...
physics - A helicopter is flying horizontally at 7.5 m/s and an altitude of 17 m...

Search
Members