Question

Please help!
Use Cramer's rule to solve the following system of equations. Enter your answer as an ordered pair, like this example: (2, -4).

Answer 1

i wish i could help nut I’m literally awful at math.

Answer 2

lets see what i remember about cramer's rule..

Answer 3

x - 2y = -9
3x + y = 1
answer col.
determinant form D = | 1 -2 | | -9|
! 3 1 | | 1|
determinant
with answer cols. in x Dx = | -9 -2 |
| 1 1 |

evaluating the determinant we get

D = 1 - (-2*3) = 1 + 6 = 7
Dx = -9 - (-2) = -7

so by Cramer's rule x = Dx / D = -7/7 = -1

Answer 4

To find the value of y first write out Dy by replacing the second column of D by the answer column . Then evaluate y in a similar fashion to the above.