4.6 Cramer's rule

4.6 Cramer's rule

4.6 CRAMERS RULE Use the determinants to solve systems of equations

Ex: ax + by = e cx + dy = f x= x= and y = Write the answer as (x, y) and y =

SOLVE THE SYSTEM OF EQUATIONS USING CRAMERS RULE 1. 5x + 4y = 28 3x 2y = 8 2. 2x 3y = 12 -6x + y = -20

FROM THE SAME GRADES. IN THE 10 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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