Question

Please help! Correct answr only, please! The following information matrices show the number of breakfasts & lunches sold at a little creek middle school on Monday and the prices of breakfast and lunch Which of the following best describes the element? A. Sixth graders paid a total of $60.50 for their breakfast meals on Monday. B. There are 22 sixth graders eating breakfast on Monday. C. Sixth graders paid a total of $508.50 for all their meals on Monday. D. Breakfast costs $2.75

Answer 1

Answer: a) 6th graders paid a total of $508.50 for all their meals

Explanation:

When multiplying matrices, multiply each term in Row 1 of the first matrix by each term in Column 1 of the second Matrix and find their sum. Repeat for each row.

Subscript 1, 1 means you want the sum for Row 1 × Column 1

Row 1 = 6th grade × Column 1 = Price for all meals

= 22(2.75) + 128(3.50)

= 508.50