Two trains leave towns 744mi apart at the same time and travel toward each other. One train travels 10 /mih slower than the other. If they meet in 4 hours, what...

Two trains leave towns 744mi apart at the same time and travel toward each other. One train travels 10 /mih slower than the other. If they meet in 4 hours, what...

A library contains 2000 books. There are 3 times as many nonfiction books as fiction books. Write and solve a system of equations to determine the number of nonfiction and fiction books.

i need help solving for this problem because i am very confused on it

Its a graphing problem

A bicyclist heads east at 19 km/h. After she has traveled 22.5 kilometers, another cyclist sets out in the same direction going 28 km/h. About how long will it take the second cyclist to catch up...

(SOLVING SYSTEMS) the length of a rectangle is 5 times its width. The perimeter is 84. What system of equations can be solved to find its length and the width of the rectangle? And why? I...

Hi, the question deals with systems of linear equations

2x-3y+z=5 x+y+z=0 4x+2y+4z=4

This is how I set up my system... but I can't solve it getting the right answer. Let a= helicopter's speed and w=wind speed 1.5(a+w)=300 3(a-w)=300 I...

2x +z=4 2x-y =4 x+y-z=0

You invest $7200 in two accounts paying 6% and 10% annual interest. At the end of the year the accounts earn the same interest. Set up a system and solve for how much was invested at each rate&nb...

Consider the following two systems -6x-y=2 2x-9y=3 -6x-y=3 2x-9y=2 Find the inverse of the (common) coefficient matrix of the two systems. A-1=...

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Help? Systems..

Consistent or inconsistent? y = 2x + 5 -2x + y = -2

A basketball player scored 40 points in a game. The number of three-point field goals the player made was 22 less than three times the number of free throws (each worth 1 point). Twice the number...