PRACTICE TEST:
Let A =
Find A + B.
NON-CALCULATOR
and B =
Let A =
and B =
Find 4A - B.
.
Let A =
Find A - B.
and B =
.
.
Let A =
and B =
4X + A = B. Solve for X.
.
Find the product AB, if
possible:
A=
, B=
A=
, B=
A=
, B=
Find the inverse of the
matrix, if possible.
A =[
−3 −1
]
5
2
Evaluate the determinant.
A =[
3 −6
]
2 −4
−4 5
A =[
]
5 −4
Solve the following using an inverse matrix
(NON-CALCULATOR)
7x + 2y = 40
6x + 2y = 34
6x + 8y = 102
-2y = -12
---------CALCULATOR-----------------------------------------------------------------------------------------------------------------------------Solve the following systems of equations using inverses.
5x + 6y + 5z = 59
9x - 2y + 2z = -2
3x - 2y + 3z = -15
2x - 2z = 12
2y - 2z = 12
5x + 2y + 7z = 14
Set up a system of equations to represent the scenarios described below.
Then solve using matrices and interpret the solution within the context of the situation.
Larry bought 3 gallons of milk and 1 box of cereal for $9.47.
Jean bought 1 gallon of milk and 2 boxes of cereal for $8.99.
How much would 3 boxes of cereal and 2 gallons fo milk cost?
Tricia buys 3 shirts & 4 rings for $56.
Leslie buys 5 shirts & 2 rings for $70.
Find the price of each.