Question

ПОМГОИТЕ СРОЧНО ПОЖАЛУЙСТА!!!!
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Answer 1

1)

$\frac{14x - 9}{17x} + \frac{3x - 25}{17x} = \frac{14x - 9 + 3x - 25}{17x} = \\ \frac{17x - 36}{17x}$

2)

$\frac{3}{5a} - \frac{5}{4a} = \frac{3 \times 4a - 5 \times 5a}{20a} = \\ = \frac{12a - 25a}{20a} = \frac{ - 13a}{20a} = - \frac{13}{20} = - 0.65$

3)

$\frac{ax + ay}{xy {}^{3} } \times \frac{x {}^{3}y }{8x + 8y} = \frac{a(x + y)}{x {y}^{3 }} \times \frac{ {x}^{3}y }{8(x + y)} = \frac{a {x}^{2} }{8 {y}^{2} }$

4)

$( \frac{4 {c}^{5} }{7 {b}^{3} } ) {}^{2} = \frac{ {4}^{2} {c}^{5 \times 2} }{ {7}^{2}b {}^{3 \times 2} } = \frac{16 {c}^{10} }{49 {b}^{6} }$