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

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

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.

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...

Its a graphing problem

Hi, the question deals with systems of linear equations

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

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

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...

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...