Which expression is equivalent to 13(x+6)−4 ? 13x−2

x+2

13x+2

3x−14

P. S the 13x is fraction 1 over 3. thx. i will give brainilest btw :D

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Factor the polynomial expression x6 – x3 – 20