Elective Mathematics

Question 1

1Solve for y: 1x + 3y = 14 and 1x + 5y = 20.

Medium

A. 5 B. 4 C. 3 D. 8

Question 2

2The determinant of [[5, 5], [1, 1]] is ___

Easy

Your answer (fill in the blank)

Question 3

3The determinant of [[2, 4], [1, 3]] is ___

Easy

Your answer (fill in the blank)

Question 4

4Find the determinant of [[5, 3], [2, 1]].

Easy

A. 11 B. 1 C. −1 D. 13

Question 5

5Solve for y: 4x + 2y = 10 and 1x + 3y = 10.

Medium

A. 2 B. 1 C. 3 D. 4

Question 6

6The determinant of [[1, 4], [2, 6]] is ___

Easy

Your answer (fill in the blank)

Question 7

7Solve for y: 3x + 2y = 7 and 1x + 4y = 9.

Medium

A. 1 B. 4 C. 2 D. 3

Question 8

8The determinant of [[4, 3], [4, 1]] is ___

Easy

Your answer (fill in the blank)

Question 9

9Use Cramer's rule to find x: 2x + 4y = 26, 1x + 1y = 9.

Medium

A. 7 B. 5 C. 4 D. 6

Question 10

10Interchanging two rows changes the sign of a determinant.

Medium

A. True B. False