tolong yah jawab 6,7,8,9,10

[tex] 6. \: \: {16}^{2} - {8}^{2} \\ 256 - 64 = 192 \: \: c \\ \\ 7. \: \: {25}^{2} + \sqrt{441} \\ 625 + 21 = 646 \: \: c \\ \\ 8. \: \: 12\% |0.25 | \frac{2}{3} | 1 \frac{1}{2} \: \: b \\ \\ 9. \: \: 7 \frac{1}{3} + 6 \frac{3}{4} \\ \frac{22}{3} + \frac{27}{4} \\ \frac{88}{12} + \frac{81}{12} = \frac{169}{12} = 14 \frac{1}{12} \: \: d[/tex]