Which matrix is equal to the product HJ(Picture attached)Answer choices:A.) [26 over 2]B.) [80 over -44]C.) [83 over -29]D.) [76 over 0]

Multiply the first row of H and first column of J to get
2*(-1)+5*3+10*7=83 [top value]
For the second row and first column of J
-4(-1)+3(3)-6(7)=4+9-42=-29  [bottom value]