Given the reaction: \( \mathrm{Ba}(\mathrm{NO} 3) 2(\mathrm{aq})+2 \mathrm{KCl}(\mathrm{aq})-->\mathrm{BaCl} 2(\mathrm{~s})+2 \mathrm{KNO} 3(\mathrm{aq}) \) What is the net ionic equation?

- A circle with a diameter of 13 feet Radius \( =\quad \) ?Circumference \( =\quad \) ? \( \quad \) Area \( =\quad \ldots \)

Iatch each expression on the left with its product on the right. \( \begin{array}{ll}(3 d+1)\left(d^{2}-2\right) & 3 d^{3}+6 d^{2}-d- \\ (d-1)\left(3 d^{2}+2 d+2\right) & 3 d^{3}+d^{2}-6 d- \\ \left(3 d^{2}-1\right)(d+2) & 3 d^{3}-d^{2}-2\end{array} \)

Ub. Prove a desigualdade \[ a^{2}+b^{2} \geq 2 a b, \quad \forall a, b \geq 0 . \] Utilize esta desigualdade para demonstrar que a média geométrica de dois números posi tivos nunca excede a sua média aritmética: se \( a>0 \) e \( b>0 \) então \[ \sqrt{a b} \leq \frac{a+b}{2} . \] 07.

Отметьте в тет] зке \( C D \) точку етьте точку \( P \) Начертите пря чных обозначе

Fill in the blanks so that the following statement is true. The fractions in the equation \( \frac{x}{4}=3+\frac{x-4}{7} \) can be eliminated by multiplying both sides by the 0 of 1 The fractions in the equation \( \frac{x}{4}=3+\frac{x-4}{7} \) can be eliminated by multiplying both sides by the \( \square \frac{x}{4} \) and \( \frac{x-4}{7} \), which is Thes of \( \frac{x}{4} \) and \( \frac{x-4}{7} \), which is