Recent content by BilloRani2012

Can you please help me with part b) --> b) At Alex's party he bought 5 meat pizzas, 2 veg pizzas and 4 loaves of garlic bread. It cost him $96. Use matrices to calculate the cos of the different pizzas. My Equation is: 5m + 2v + 4g = 96 but how would i calculate the price of each type of...

When you say: Perform the multiplication and set the result equal to C. Do you mean multiply A&B?

oh yeppp...thanks :)

okay i did it using those2 equations and got a = $22 g(garlic bread) = $4 and i substituted it back into the 2 equations: phill --> 4a + 1 = 92 abby --> 2a + 10 = 84 and got 92 and 84...so is that right??

Homework Statement If: A = l 1 -3 l , B = l -1 2 l C = l -12 -11 l l 2 1 l l 3 1 l l -10 -1 l Then, find X if AXB=C Homework Equations The Attempt at a Solution I don't know how I would start this problem??

okay thanks :) could be please try and help me with my other question i put up? it's called Matrices Question 2...thanks again

okay, so would my 2 equations be: phill --> 4a + 1 = 92 abby --> 2a + 10 = 84 and convert that into a matix and solve for a?? because the question asks to solve using matrices!

well since the first part of Q1a) says to find Pmv (Price of meat and veg pizza), would the 2x2 matix be this: l 4 4 l l m l = l 91 l l 2 2 l l v l l 74 l would that be right? and just solve for m and v? BTW, i got 91 and 74 from my original equation. I subtracted the garlic...

Homework Statement If l -1 2 l l x l = l 2 l l 1 -2 l l y l l 1 l Show that the two lines are parallel and so never cross. Homework Equations The Attempt at a Solution I have attempted it, and so far all i have done is find the determentant. When i do this, i get...

i'm a little confused...how would you write it as a 2x2 matix when we have 3 variables?

Homework Statement Phil bought 4 meat pizzas, 4 veg pizzas and one loaf of garlic bread, and it costs him $92. By Abyy, who is partial to garlic bread, bough 2 meat pizzas, 2 veg pizzas and 10 loaves of garlic bread, and it cost $84. a) Use matrices to find Pmv, the most of 1 meat pizza...

okay i did it and got x = 3/2 and y = 11/2. is that right?

okay so i did it and got the determant = 2 | 4 -2 | lxl = l-5l | -3 1 | lyl l 1 l

but what happens to the -5 in the first equation and -1 in the 2nd equation

Homework Statement Use Matrices to solve for x and y if: 2y - 4x - 5 = 0 and y = 3x + 1 Homework Equations The Attempt at a Solution I have done it, but i get a determinant of zero. So is this right? My working is the following: i rewrote both equations in the form of...