Question

Math

Kamal wrote the augmented matrix below to represent a system of equations. 13-1-9 3 2 0 2 #6 Which matrix results from the operation-3R2 Rn A student performed row operations on a matrix as shown belovw. -4 1 2 4 3 2 4 5 3 0 10 7 Which operations did the student perform? O 2R2+ R3R3 ○ 2R3+-R3 → R3 ○ 2R2+R3-R2,R3 A shipping company charges a flat rate of $7 for packages weighing five pounds or less, $15 for packages weighing more than five pounds but less than ten pounds, and $22 for packages weighing more than ten pounds During one hour, the company had 13 packages that totaled S168. The number of packages weighing five pounds or less was three more than those weighing more than ten pounds. The system of equations below represents the situation s+m+-13 7s+15m+221-188 #8 Which matrix can be used to show the number of packages in the different weight classes during that hour? The drama club at a local high school sells adult, teen, and child tickets for a school play. The matrix below represents the tickets sold and the total cost of the tickets for three performances 3 12 8102 8 18 6 162 0 15 5 85 #9 Which of the following is the result of performing the row operation-Ri + R2→R2 on this matrix?

Answer 1

-3R ER Row 2 gets mulliplied by 3 New matrix is o il- 1-3 -9 3127 13 2 l © By looking at new matrix, we can say that twice of sow 2 is added to row 3. :. 2R2 + Rg - Rz.