Finite Math 200 Question need help with all 4 problems

Section 2.5 1. Perform the indicated operation. 213 231"-12 8 3 1 1-2 -31 2. If A is a 3 X 4 matrix, B is a 4 X 2 matrix, and C is a 2 x 5 matrix, then what is the dimension of the product ABC? 3. Find the values of x, y and z if [2 }} ][2 3] = [4 3]- 4. A farmer's three children, Amy, Beth, and Chad, run three roadside produce stands during the summer months. One weekend they all sell watermelons (M), yellow squash (S), and tomatoes (T). The matrices A and B tabulate the number of pounds of each product sold by each sibling on Saturday and Sunday. Saturday Sunday M S T M S T 120 50 60] Amy 80 100 401 Amy A = 40 25 30 Beth B = 110 55 70 Beth 60 30 20 Chad 90 50 60] Chad The matrix C gives the price per pound (in dollars) for each type of produce that they sell. 0.10] M C = 0.50 S 1.00] T Perform each of the following matrix operations, and interpret the entries in each result. a. A + B b. (A + B ) C