Question

poderiam me ajudar na questão 8, 9 e 10 pfv

Answer 1

8)

$4x - 15 = 45 \\ 4x = 45 + 15 \\ 4x = 60 \\ \frac{60}{4} \\ \\ x = 15$

9)

$( - 2)^{3} \\ - {2}^{3} \\ - (2 \times 2 \times 2) \\ - 8$

$( - 5)^{2} \\ {5}^{2} \\ 5 \times 5 \\ 25$

10)

$( \frac{2}{3} )^{3} \\ \\ \frac{ {2}^{3} }{ {3}^{3} } \\ \\ \frac{8}{27}$

$( \frac{3}{4} )^{ - 2} \\ \\ ( \frac{4}{3} )^{2} \\ \\ \frac{16}{9}$

$\Large\mathscr{\red{Attard}}$