Math

Evaluate:|12 5 -2|
|-3 0 1|
|-5 4 2|

It's going to be really confusing if I post my work. I got -127 from all the confusing things I did

  1. 👍 0
  2. 👎 0
  3. 👁 39
asked by Jon
  1. 12 5 -2

    -3 0 1

    -5 4 2

    Expand the determinant along the second row:

    3 times det of

    5 -2


    4 2


    = 3* 18 = 54


    -1 times det of

    12 5


    -5 4

    = -73


    54 - 73 = -19

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math. Need help

    1.if g=5 and k=1, evaluate 9+gk a. 13 b. 14 c. 15 d. 16 2.Evaluate a-b^2/b if a = 10 and b = 2. a. 1 b. 3 c. 8 d. 32 3.Evaluate 3xy^2 - y if x = 2 and y = 5. a. 26 b. 30 c. 120 d. 145 4.Evaluate 2d + d^2/3 if d = 6. a. 4 b. 12 c.

    asked by A. on August 28, 2016
  2. log

    please help given that 4^(2x+1) X 7^(x-1) = 8^x X 14^2x evaluate 14^x this is what i did, but i got stuck anyways. 2^(4x+2) X 7^(x-1) = 2^3x X 14^2x 2^(x+2) = 2^2x X 7^(x+1) sorry this might be a bit confusing, but the big letter

    asked by log on July 2, 2009
  3. English help

    How you evaluate the pied pipers true motives for getting rid of the rats in "the pied piper of Hamelin"? It's an open ended response and this story is so confusing. Need help ASAP!!!

    asked by Anonymous on August 31, 2014
  4. pre-cal

    Given that lim x->c f(x)=6 and that lim x->c g(x)= -4, evaluate the following limit. Assume that c is a constant. The x in front of the f is confusing me. lim [xf(x) + 3 g(x)]^2 x->c

    asked by Randy on May 8, 2010
  5. math

    i need some serious help with limits in pre-calc. here are a few questions that i really do not understand. 1. Evaluate: lim (3x^3-2x^2+5) x--> -1 2. Evaluate: lim [ln(4x+1) x-->2 3. Evaluate: lim[cos(pi x/3)] x-->2 4. Evaluate:

    asked by Dani on July 13, 2010
  6. Calculus

    What is implicit differentiation...as in what would be the steps in solving it. I read my textbook but it seems very confusing. 1) Differentiate both sides with respect to x 2) Realize that y is a function of x 3) Solve for y Plus

    asked by Nikita on November 4, 2009
  7. Physics I

    I have this vector that is confusing me I know what I need to do but the components of these vectors are confusing me. Problem: You are standing at point with coor dinates (1m, -1m, -2m) another erson is at r(t)=(8m)i - (3m/s^3)

    asked by David on March 18, 2011
  8. Algebra

    I have an exponent properties test tomorrow, its our last one before the final, so its important, but anyways, there is one question on the review that is confusing me. Could you please help? Here it is : (2y2x7)(-xy)(9x-3y) I

    asked by Abigail on January 6, 2011
  9. Algebra

    Consider these equation and inequalities 2/3x=1/3x+1/4 2/3x 1\3x+1/4 Evaluate 2/3 x for x= 1/2 Evaluate 1/3x+1/4 for x= 1/2 Evaluate 2/3 x for x= 2 Evaluate 1/3x+1/4 for x=2

    asked by Cheyenne on April 9, 2018
  10. Calculus

    Using l'hopitals rule, evaluate the following: Lim x-->infinity Inx/2(x)^1/2 Limx-->0 (1/x - 1/e^x -1) I tried both multiple times and I'm still not getting an answer. For the first one I tried l'hopitals rule 3 times and I'm

    asked by Maya on May 10, 2016

More Similar Questions