Question

ПОМОГИТЕ СРОЧНО! ОЧЕНЬ НУЖНА ПОМОЩЬ!!!!!!!

Answer 1

Объяснение:

ответ::::::::::::::

Answer 2

1)

$6d+\frac{2c-6d^{2}}{d} =\frac{6d^{2}}{d} +\frac{2c-6d^{2}}{d} =\frac{6d^{2}+2c-6d^{2}}{d} =\frac{2c}{d}$

$\frac{2c}{d} =\frac{2*13.02}{4.2} =\frac{26.04}{4.2} =6.2$

2)

$\frac{4b}{a-b} *\frac{a^{2}-ab}{8b} =\frac{4b}{a-b} *\frac{a(a-b)}{8b} =\frac{a}{2}$

$\frac{a}{2} =\frac{8}{2} =4$

3)

$(x-9):\frac{x^{2}-18x+81}{x+9} =(x-9)*\frac{x+9}{(x-9)^{2}} =\frac{x+9}{x-9}$

$\frac{x+9}{x-9} =\frac{29+9}{29-9} =\frac{38}{20} =\frac{19}{10} =1.9$