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4.6 Cramer’s rule

4.6 Cramer’s rule. Use the determinants to solve systems of equations Ex: ax + by = e cx + dy = f x = and y = Write the answer as (x, y) x = and y =. Solve the system of equations using Cramer’s rule. 1. 5x + 4y = 28 3x – 2y = 8.

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4.6 Cramer’s rule

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  1. 4.6 Cramer’s rule

  2. Use the determinants to solve systems of equations • Ex: ax + by = e cx + dy = f x = and y = Write the answer as (x, y) x = and y =

  3. Solve the system of equations using Cramer’s rule 1. 5x + 4y = 28 3x – 2y = 8

  4. 2. 2x – 3y = 12 -6x + y = -20

  5. In voting for the colors of a new high school, blue & gold received 440 votes from 10th and 11th graders while red & black received 210 votes from the same grades. In the 10th grade, blue & gold received 72% of the total and Red & black received 28%. In the 11th grade, Blue & gold received 64% of the total and Red & Black received 36%. • Write a system of equations that represents the total number of votes for each pair of colors. • Find the total number of votes cast in 10th grade and in 11th grade.

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