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March 31, 2015

March 31, 2015

Posted by **Nicole C.** on Tuesday, February 3, 2009 at 9:21pm.

The first:

We have to use the motion problem formula: d=rt and make a table containing the elements:

rate: * time: = distance

------------------------------

label #1

label #2

The Directions for this problem's section:

Make a table, and use systems of equations to solve these word problems.

Problem:

Flying with the wind, a plane travels 1200 nautical miles in 4 hours. Flying against the wind, it travels 500 nautical miles in 2 hours. What is the speed of the plane in still air and the speed of the wind?

***I have figured out that on the table label #1 will be "With the wind" and label #2 will be "Against the wind"***

Thank you so much for any help that I can get!!!

- 8th Grade Math (Algebra1) -
**Baby Phat**, Tuesday, February 3, 2009 at 9:34pmSorry but we never learned that kind of math I wished I could help you I read all the instructions I know math, but not that kind. I'm sorry.

- 8th Grade Math (Algebra1) -
**Nicole C.**, Tuesday, February 3, 2009 at 9:36pmits alright, I don't get much myself...even after going through this about 4 months ago. thank you for trying!

- 8th Grade Math (Algebra1) -
**Nicole C.**, Tuesday, February 3, 2009 at 9:40pmAnother problem that I have that includes the same directions are:

A plane leaves Lignoier Airport and travels west at 230 mph. A second plane leaves 3 hours later and travels east at 215 mph. How long has each plane flown when the two planes are 1135 miles apart?

- 8th Grade Math (Algebra1) -Please Help ME!!- -
**Nicole C.**, Tuesday, February 3, 2009 at 9:57pmPlease Help me!!!! This is due tomorrow (our teacher gives us one night to do it) and I'm confused and I don't know what to do about it!

- 8th Grade Math (Algebra1) -
**Reiny**, Tuesday, February 3, 2009 at 10:39pmNicole, re your first question

In your chart, in the row "with the wind"

fill in D as 1200, R as x+y, and T as 4

in the row "against the wind", fill in

D = 500, R = x-y, and T = 2

from first row: 1200 = 4(x+y)

4x + 4y = 1200

x + y = 300 (#1)

from second row: 500 = 2(x-y)

2x - 2y = 500

x - y = 250 (#2)

add #1 and#2 ----> 2x = 550

x = 275

sub into #1 275 + y = 300

y = 25

- Lignoeir question -
**Reiny**, Tuesday, February 3, 2009 at 10:47pm"A plane leaves Lignoier Airport and travels west at 230 mph. A second plane leaves 3 hours later and travels east at 215 mph. How long has each plane flown when the two planes are 1135 miles apart?

"

form two rows in your chart:

first: going west

second: going east

Going West: T = t hours, R = 230 km/h, D = 230t km

Goint East: T = t-3 hours, R = 215 km/h, D = 215(t-3)

When is total D = 1135 ?

230t + 215(t-3) = 1135

.

.

t = 4

first one flew 4 hours, the second flew 1 hour.

- 8th Grade Math (Algebra1) -
**Alice**, Friday, February 6, 2009 at 3:00amWhat is domain?

- 8th Grade Math (Algebra1) -
**kellie**, Wednesday, February 18, 2009 at 6:19pmy=x+2

- 8th Grade Math (Algebra1) -
**hottie**, Wednesday, February 18, 2009 at 6:26pmwhat is x-2=12?

- 8th Grade Math (Algebra1) -
**hottie**, Wednesday, February 18, 2009 at 6:27pmcan someone help

- 8th Grade Math (Algebra1) -
- 8th Grade Math (Algebra1) -
**Jamiee**, Wednesday, February 18, 2009 at 6:34pmx=14

- 8th Grade Math (Algebra1) -
**maria**, Thursday, February 19, 2009 at 7:02pm6-3=

5xO=

(2x)-1

simpllify thesepositive exponents

- 8th Grade Math (Algebra1) -
**tj 45**, Thursday, February 19, 2009 at 9:14pmsorry i wish i could help ,but i am kind of confused about this kind of algebra

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