Question

revolva a expressão . preciso urgente​

Answer 1

1)

$\mathsf{17-(-2)=17+2=19}$

2)

$\mathsf{3-[4+(9^{2}-5).(-2)] +1}\\\mathsf{3-[4+(81-5).(-2)] +1}\\\mathsf{3-[4-152]+1}\\\mathsf{3+148+1=152}$

Corrija o gabarito

3)

$\mathsf{\dfrac{1}{2},\dfrac{3}{4},\dfrac{1}{4}=\dfrac{2}{4},\dfrac{3}{4},\dfrac{1}{4}}$

$\mathsf{\dfrac{1}{4}\textless\,\dfrac{2}{4}\textless\,\dfrac{3}{4}\to~\dfrac{1}{4}\textless\,\dfrac{1}{2}\textless\,\dfrac{3}{4}}$

$\boxed{\boxed{\boxed{\mathsf{\maltese~~Alternativa\,e}}}}$

4)

$\mathsf{\sqrt{4}\textless\,\sqrt{5}\textless\,\sqrt{9}\to\,2\textless\,\sqrt{5}\textless\,3}$

$\boxed{\boxed{\boxed{\mathsf{\maltese~~Alternativa\,b}}}}$

5)

$\mathsf{A=b.h}\\\mathsf{250=b.10}\\\mathsf{b=\dfrac{250}{10}=25m}\\\mathsf{p=2(b+h)}\\\mathsf{p=2.(25+10)=2.35=70m}$

$\boxed{\boxed{\boxed{\mathsf{\maltese~~Alternativa\,b}}}}$

6)

As afirmativas ll e lll são verdadeiras.