The Johnson family is considering switching to a family plan offered by a cell phone company. The plan costs R480 permonth and includes 3 lines. Each additional line costs an extra R15 per month. If the Johnson fomily wants to have 5 lines in total, how much would they save per month by switching to the family plan compared to getting individual plans for each family member, which cost R105 per line? R R15 R20 Rone None

Question What is the measure of each angle of a regular octagon? If necessary, round to the nearest tenth. Answer Attempt 1 out of 2

Multiplicacion de Fracciones Algebrairas 1) \( \frac{3 x}{2 y} \cdot \frac{y^{2}}{6 x} \) 2) \( \frac{2 a^{3}}{15 b^{5}} \cdot \frac{5 a b^{6}}{8 a^{2} b} \) 3) \( \frac{12 x^{2} y}{5 y} \cdot \frac{10 x}{6 x y} \) 4) \( \frac{18 a^{2} b c}{2} \cdot \frac{20 a b}{3} \) 5) \( \frac{2 a}{3 b^{3}} \cdot \frac{3 b^{2}}{4 x} \cdot \frac{x^{2}}{2 a^{2}} \) 6) \( \frac{x^{2}}{x^{2}-4} \cdot \frac{x+2}{3 x^{2}-x}= \) 1) \( \frac{2 x^{2}+2 x}{2 x^{2}} \cdot \frac{x^{2}-3 x}{x^{2}-2 x-3} \) 1 \( \frac{4}{x^{2}-25} \cdot \frac{x^{2}-2 x-15}{x+2} \) 8) \( \frac{x^{2}-1}{x^{2}+2 x+1} \cdot \frac{x^{2}+2 x}{x^{2}+x-2}= \)

4. \( 5 x-2(2 x-1=6 \) Solve for \( x \)

(b) \( \frac{3 x-2}{2}=\frac{2 x+6}{5} \)

Resolva as equações a seguir considerando como universo o conjunto dos números complexos. \( \begin{array}{ll}\text { a) } x^{2}+64=0 & \text { b) } 4 x^{2}-4 x+5=0\end{array} \)