MATH MISC Introduction to Statistics with Calculus - Columbia College. Edmentum Assessments _ Pretest: Matrices

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MATH MISC Introduction to Statistics with Calculus - Columbia College. Edmentum Assessments _ Pretest: Matrices 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/4 ... 5317311?answers=true 1/13 Pretest: Matrices Name: Date: Instructor: 1 Type the correct answer in each box. Create a matrix for this linear system: Question serial: FIB-7B12-8A70-582D The determinant of the coeÞcient matrix is -6 . x = 5 y = 4 z = 3 2 Select all the correct answers. Which of these matrices have positive determinants? Question serial: MC-2C80-8EA1-E5EA . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 2/13 3 A milkshake vendor sells shakes in three diàerent Öavors: mango, strawberry, and chocolate. This table gives the number of shakes of each Öavor sold during three shifts on one day. Mango Strawberry Chocolate Shift 1 16 13 29 Shift 2 26 19 45 Shift 3 6 11 0 Total sales were $419 in the Õrst shift, $649 in the second shift, and $96 in the third shift. If you form a linear system representing the data in the table and create a matrix from it, the determinant is 578. What is the price of one chocolate shake? A. $2 B. $4 C. $7 D. $9 Question serial: MC-EE11-997B-A948 4 Match each determinant value to the correct matrix. Drag the tiles to the boxes to form correct pairs. Not all tiles will be used. Question serial: MCH-5698-D1BB-647C . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 3/13 5 Drag each value to the correct location on the matrix. , , and . Match each value to the correct entry in matrix A. Question serial: GGM-11D4-D629-1686 6 For which pair of matrices is ? A. B. C. D. Question serial: MC-6B57-1049-C476 . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 4/13 7 Bill's Apparel and Bud's Apparel are two sporting goods retailers. Bill's want to buy 360 small jerseys, 540 medium jerseys, and 300 large jerseys, while Bud's want to buy 240 small jerseys, 600 medium jerseys, and 360 large jerseys. The two dealers from which they are looking to buy their jerseys are Zest Athletics and Zeal Sporting Wear. Zest charges $14 for small jerseys, $18 for medium jerseys, and $21 for large jerseys. Zeal charges $16 for small jerseys, $18 for medium jerseys, and $19 for large jerseys. Use matrix multiplication to Õnd the dealer each retailer should choose for its purchase. A. Bill's and Bud's both should purchase from Zest. B. Bill's and Bud's both should purchase from Zeal. C. Bill's should purchase from Zeal, and Bud's should purchase from Zest. D. Bill's should purchase from Zest, and Bud's should purchase from Zeal. Question serial: MC-74E1-A18C-CC0E 8 Drag the tiles to the boxes to form correct pairs. Not all tiles will be used. , , and . Match the lettered entries in matrices A, B, and AB to their values. Question serial: MCH-B8D7-E1A5-D80A . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 5/13 9 Drag each set of column entries to the correct location in the matrix equation. Not all sets of entries will be used. A biker needs to pass two checkpoints before completing a race. The total distance for the race is 120 miles. The distance from the starting point to checkpoint 1 is 35 miles more than half the distance from checkpoint 1 to checkpoint 2. The distance from checkpoint 2 to the Õnish line is 20 miles less than twice the distance from checkpoint 1 to checkpoint 2. Let x represent the distance from the starting point to checkpoint 1, y represent the distance from checkpoint 1 to checkpoint 2, and z represent the distance from checkpoint 2 to the Õnish line. Complete the matrix equation that models this situation, A-1B = X. Question serial: GGM-53B8-EC35-7044 10 Select the correct systems of equations. Identify each system of linear equations that has an inverse for its coeÞcient matrix. Question serial: HS-E7D7-0585-49B8 . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 6/13 11 Which is the inverse of this matrix? A. B. C. D. Question serial: MC-EA32-92BD-50A9 12 Solve this system of equations using the inverse of a matrix. Round each value to the nearest hundredth, if necessary. [Hint: and ] A. , , and B. , , and C. , , and D. , , and Question serial: MC-3132-A95D-080E.2 13 Type the correct answer in each box. The vector is reÖected across the line and then rotated by radians. Question serial: FIB-93C0-EDB6-0ECC If the resulting vector is , then a = 2 and b = 4 . . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 7/13 14 Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix? A. B. C. D. E. Question serial: MC-46E1-CC95-4476 15 What is the result of this matrix multiplication? A. B. C. D. Question serial: MC-A715-D141-4E87 . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 8/13 16 Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. The vector matrix is rotated at diàerent angles. Match the angles of rotation with the vector matrices they produce. Question serial: MCH-31E5-7686-6544 17 Drag each set of column entries to the correct location in the augmented matrix. Not all sets of entries will be used. Mac traveled to three cities on one highway. The total distance one way was 320 miles. The distance from his original location to the Õrst city was 20 miles more than half the distance from the Õrst city to the second city. The distance from the second city to the third city was 75 miles less than the distance from the Õrst city to the second city. Let x represent the distance from the original location to the Õrst city, y represent the distance from the Õrst city to the second city, and z represent the distance from the second city to the third city. Place the correct sets of column entries in the augmented matrix that models Mac's situation. Question serial: GGM-43B6-BC6D-E45C 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 9/13 18 Select the correct systems of equations. Which systems of linear equations have no solution? Question serial: HS-8A47-1045-1534 19 What is the value of y in this linear system? A. B. C. D. E. Question serial: MC-4EE2-80B6-686D . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 10/13 20 How is the Gauss-Jordan elimination method diàerent from the Gaussian elimination method? A. The Gauss-Jordan elimination method does not allow triangularization of a matrix. B. The Gauss-Jordan elimination method seeks to reduce all entries apart from the diagonal entries to 0 and get 1s in the diagonal entries. C. The Gauss-Jordan elimination method does not require a matrix. D. The two methods have diàerent rules for elementary row operations. Question serial: MC-E6DC-54A9-8918 21 Type the correct answer in each box. Question serial: FIB-173A-06A8-D655 If matrix C represents (A - B) + A, the value of the entry represented by c41 is 12 and the corresponding entry in (A + B) - A is 2 . 22 Type the correct answer in each box. Question serial: FIB-5513-61BA-11C1 If , then a = 6 , b = 3 , c = 9 , and d = -6 . . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 11/13 23 Select all the correct answers. Which matrices are equal to ? Question serial: MC-70DB-17B4-9A77 24 What is the result of this operation? A. B. C. D. Question serial: MC-7890-D176-7BD3.1 . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 12/13 25 Type the correct answer in each box. Question serial: FIB-43D8-3127-CCEC a = -2 , b = 1 , c = 4 , and d = 0 . 26 Type the correct answer in each box. and Question serial: FIB-83A3-E77E-48DB In , the entry represented by is -15 . In , the entry represented by is -27 . 27 The matrix is multiplied by a scalar to get . What is the scalar value? A. B. C. D. Question serial: MC-3421-796A-EB24 . 10/6/2019 Pretest: Matrices https://f1.app.edmentum.com/assessments-delivery/print/la/45317311?answers=true 13/13 28 The table shows Amy's, Jenny's, and Meg's sales for the month of February. They get a 5% commission on their sales. Which matrix gives the commission they earned for each type of product? Sales Amy Jenny Meg Books 120 250 215 Games 155 106 175 Tablets 350 400 290 A. B. C. D. Question serial: MC-8184-4B11-CA98 . [Show More]

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