Geiger had a total of twenty eight $5 and $10 bills. If the total amount of money in his pocket is $180 how many of each bill did he have?

Geiger had a total of twenty eight $5 and $10 bills. If the total amount of money in his pocket is $180 how many of each bill did he have?

Martha invested a total of $48,000 in two different funds. One fund earned 10.5% interest and the other earned 12% in one year. After that year her account showed $5520 in interest. How much did she...

A bug is moving along the line 3x + 4y = 12 with constant speed 5 units per second. The bug crosses the x-axis when t = 0 seconds. It crosses the y-axis later. Where is the bug when...

http://i.imgur.com/PknZsfZ.png I'm confused on why the first row has values 0 + yk+1 + 0 and the second row has 0 + 0 + yk+2

[-3 1] [2 2]

ABCT DBAT C= ABT My answer is (CT)-1B-1 BT C-1 (AT)-1 B-1

x1 -2x2 -x3 = b1 -4x1 +5x2 + 2x3 = b2 -4x1 + 7x2 + 4x3 = b3

A= [ 2 -1 4 3 ] [ 2 1 0 1 ] [ 3 -4 1 2 ] [ 1 2 3 -1]

CT B-1 A2 BAC-1 DA-2 BT C-2 = CT My answer is : D= BA-2 B-1 A-1 CA2 (BT)-1 C2

ABCt DBAtC=ABt

Could someone explain the steps involved in order to find the matrix.

A commuter airline wants to purchase a fleet of 28 planes with a combined carrying of 960 passenger. The three available types of planes carry 16,24,and 40 passenge, respectively. Determine all possible...

A= [ 4 a-b 6] [ 2 3 b+c ] [ a-b+c 5 -2] What I dont imderstand is how you get this...

Simplify ( 2AC-1)-1 (AC-1) (AC-1)-1 AD-1 First off, Im not even sure what the topic of this question is. In my book , it just " simplify" so im having a hard time finding...

Write the matrice as a product of elementary matrices. A= [2 0] [-6 1] I dont understand what you have to do.

Lets say I have this table, X y 2 10 4 6 6 2 8 ...

x+y+z=1 2x+2y+2z=2 x+y+z=0 Im not sure if its infinite or no solution

Let A be any mxn matrix and let 0 be the mxn matrix each of whose entries is zero . Show that if kA=0 , then k=0 or A=0. I am very lost ! Please help me show this because I think...

A= [2 -1 4] [ 3 1 -1] [ 4 2 1 ] B= [ 2 -1 4 ] [ 3 1 -1 ] [ 0 4 -7 ] Please explain me the steps. I dont understand what I have to do.

(2AT + 3T)-1 = [-4 3 ] [ 1 -1 ] Please show me steps. I dont understand how to undo the...

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