Use part (iii) of the rank of a matrix by row reduction theorem to find the rank of the given matrix. 1-2 2-4 5 1 35 rank(A) = A =

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how to find the cofactor of a 4x3 matrix

The table gives an estimate of basic caloric needs for different age groups and activity levels. Solve, (a) Use a 3 X 3 matrix to represent the daily caloric needs, by age and activity level, for men. Call this matrix M. (b) Use a 3 X 3 matrix to represent the daily caloric needs, by age and activity level, for women. Call this matrix W. (c) Find M - W. What does this matrix represent?

Construct an example of an 3x5 matrix with rank 2: You can resize a matrix (when appropriate) by clicking and dragging the bottom-right corner of the matrix. 0 0 0 0 0 A 0 0 0 0 0 = 0 0 0 0 0

The figure to the right shows the letter L in a rectangular coordinate system. The figure can be represented by the matrix B, shown to the right. Each column in the matrix describes a point on the letter. The order of the columns shows the direction in which a pencil must move to draw the letter. The L is completed by connecting the last point in the matrix, (0,9), to the starting point, (0,0). Use these ideas to complete parts (a) and (b) below. a. If A = AB - 1 0 [!!] 0 1 find AB. (Simplify your answer.) b. Graph the object represented by matrix AB. What effect does the matrix multiplication have on the letter L represented by matrix B? Choose the correct graph below. A. O B. Rotates the letter L about the origin. Reflects the letter L across the x-axis. O C. Q 077 11 0 B-[07718] 001 199 B= Reflects the letter L across the y-axis.