Thursday

March 26, 2015

March 26, 2015

Posted by **ryan** on Saturday, October 16, 2010 at 7:27pm.

- math -
**KELLY**, Saturday, October 16, 2010 at 8:19pmMake a chart for the pieces of RT=D that you know.

Rate X Time = Distance

_____________________________________

ship 30 x 30x

chopper 90 x-4 90(x-4)

You know that at the time the helicopter overtakes the ship that the distances are equal.

30x=90(x-4) set distances equal

30x = 90x-360 ditribute

-60x = -360 subt 90xfrom both sides

x =6 divide by -60

x-4 is the helicopter's time so plug in

6 for x

6-4 = 2

therefore the helicopter will take over

in 2 hours.

**Answer this Question**

**Related Questions**

math - a coast guard ship left the port at 30 mph. four hours later a helicopter...

math - a coast guar ship left a port at 30 mph. four hours later a helicopter ...

calculus - We know this is a piecewise function and we solved the first part, ...

Math - A distressed ship is 10 miles south and 8 miles east of a coast guard ...

Algebra - A coast guard helicopter receives a distress signal from a boat. the ...

Calculus - Two ships leave the same port at noon. Ship A sails north at 22 mph, ...

geometry - A ship leaves port and heads due east at a rate of 32 miles per hour...

Algebra, math, - A helicopter can fly 120 mph in still air. When flying to a ...

physics - A Coast Guard cutter detects an unidentified ship at a distance of 19....

Calculus Max/Min Prob - At 7:00 am, one ship was 60 miles due east from a second...