Show Attempt History A cold \( \left(0.15^{\circ} \mathrm{C}\right) \) piece of copper \( (5.03 \mathrm{~g}) \) was placed into a beaker with 57 mL of water at \( 326^{\circ} \mathrm{C} \). Your Answer Correct Answer a) Does the he at flow from the copper or from the water?

05) Simplifique as frações algébricas: (a) \( \left(16 x^{2}\right):\left(-4 x^{2}\right) \) (b) \( \left(36 x y^{2}\right):(-6 x y) \) (c) \( (-35 a):(+7 a) \) (d) \( \left(+3 a b^{2}\right):\left(-\frac{10}{5}\right) \) (e) \( \left(-\frac{4}{5} x^{2} y\right):\left(+\frac{4}{3} x^{2} y\right) \)

06) "Sendo o número \( \mathbf{n}=\mathbf{6 8 4}^{\mathbf{2}}-\mathbf{6 8 3}^{\mathbf{2}} \), a soma dos algarismos de n é:"

\( \overline { c } = \frac { 1 } { 400 } ( 1600000 + \frac { 2400000 } { 2 } + \frac { 12400000 } { 3 } ) \)

Какое из приведенных неравенств будет линейным неравенством с одной переменной: \[ \begin{array}{l}\square \text { A) } 5+1<21 \\ \square \text { B) } x \leq 8 \\ \square \text { C) } x+5 \leq y \\ \square \text { D) } x y \leq \frac{4}{5} \\ \square \text { E) } y>13,1 \\ \square \text { F) } 5 x>5\end{array} \]

2. Draw Conclusions Germany's offensives in the spring of 1918 were engineered by German General Erich Ludendorff. Before the campaign began, he made this statement: We must strike at the earliest moment before the Americans can throw strong forces into the scale.'What conclusions can you draw from Ludendorff's statement?