Matrix! rref!
matrices and row operations

transform this matrix to reduced row echelon form:

[2 -1. -4 | 7]
|0 -30 20 | -50|
[0 0 44 | -44]

nvm. i got it

result:
[1 0 0 | 2]
|0 1 0 | 1|
[0 0 1 | -1]

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Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.