Answer:
C: 11/42
Explanation:
-1/6 + (-3/7)
This can also be written as -1/6 + 3/7
Find the LCD: 42
Divide 42 by the original denominators: 42 / 6 = 7. 42 / 7 = 6
Multiply the numerators by the quotient: -1 x 7 = -7. 3 x 6 = 18
New equation: -7/42 + 18/42
Focus on the numerators: -7 + 18 = 11
Put it all together: 11/42