c) \( \frac{56}{\square}=\frac{-7}{8} \)

To solve for the missing value represented by the square in the equation \( \frac{56}{\square}=\frac{-7}{8} \), we can cross-multiply. This gives us: \[ 56 \cdot 8 = -7 \cdot \square \] Calculating the left side: \[ 448 = -7 \cdot \square \] Next, to isolate the square, we divide both sides by -7: \[ \square = \frac{448}{-7} = -64 \] So, the missing value is \( -64 \). If you want to check your solution, you can substitute back into the original equation: \[ \frac{56}{-64} = \frac{-7}{8} \] This simplifies to \( -\frac{7}{8} \), confirming that our solution is indeed correct!