Alright this week we were really crazy. There was carnival ball and stuff. We took a test on Thursday and Friday we didn’t have math class and a bad thing is I forgot my whole binder. If I do it on something easy I’m sorry and hope you forgive me.

Examples:

Matrices:

2[ 1 2 4] + 3{3 2 5]

{2 4 8} + { 9 6 15}= [ 11 10 23}


Named the matrices

{ 1 3 4 5}
{ 2 4 8 9} = 2x4


find AB
A(1 4 8) B(5 4 7)= (4, 0, -1)


point 8,-2, 3 and 4, 0, 7

Find center = (6,-1,5)

Radius square root (4-8)^2+(0+2)^2(7-3)^2=16+4+16 = square root of 36= 6

Equation = (x-6)^2+(y+1)^2+(2-5)^2=9^2