Theme: Matrix...
  • The sum of two numbers is 95, and their difference is 61. What are the two numbers?
  • Suppose theta= 11pi/12. use the sum identity to find the exact value of sin theta?
  • A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
  • 1. The stright line y=x+3 cuts the curve x^2 + y^2 = 29 at two points. a) Prove that x^2 + 3x - 10 = 0 b) Hence find the coordinates of the points.
  • What is an idempotent matrix?
  • Find the matrix product, if possible. Show your work please|-1 3| |5 4|multiplied by |0 -2 6||1 -3 2|
  • What’s X-y=3 2x+y=12
  • Row reduction of the augmented matrix 2x-y=7 3x+4y=-6
  • A child has a piggy bank that contains only quarters and dimes. Altogether, there are 27 coins in the bank and the total value of the coins is $4.50. How many quarters and how many dimes are in the piggy bank? I cant get the right answer no matter what I do
  • Write a function to represent each series of transformations: • rotation of 90 degrees counterclockwise about the origin, point O, then a reflection across the x-axis • reflection across the y-axis, then a translation a units to the right and b units up • translation a units to the right and b units up, then a rotation of 180 degrees counterclockwise about the origin, then a reflection across the y-axis
  • Solve the system of equations using cramer’s rule -x+y-3z=-4 3x-2y+8z=14 2x-2y+5z=7
  • Matrix. How do find x and y?
  • Matrix Question. Which expression gives the y-coordinate of the solution of the system?
  • Is Crammer’s Rule always applicable when trying to solve a system of linear equations? Explain.
  • If an equation is an identity, then how many solutions does it have? a. zero b. one c. infinite
  • Solve and verify each of the following of linear eequations 2X+3y=432 and 5x-2y=16
  • Solve the following system by any method -8x-8y=0 -8x+2y=-20
  • with this question on multiplying matrices, I’ve been on it for over 20 minutes and I’m about to cry (ignore the 240 at the end, it’s probably wrong)
  • Use the matrix method to solve? -x + 4y = 8 -2x + y = 9 -x = ___a0 -y = ___a1
  • AND WALK THROUGH! Solve the system using an augmented matrix. -x-3y=-17 2x-6y=-26 explain what I am supposed to do in this problem?
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