1. Shiona is aaving to pay for a hollday. She has 13 weeks to save E5io to pay for her holiday, Shiona already has savings of ces. In the first week, she knows she can save f7o. She plans to save equal amounts of money in each of the remaining weeks. How much does Shiona need to save in each of the remaining weeks so that she can pay for her hollday? You must show all your working.

6 The number of participants for an event in 2020 is \( Y \). In 2021 , the number of participants ia increased by \( 30 \% \). (a) White down an expression in terms of \( Y \), for the number of participants in 2021

\( f ( x ) = f ^ { \prime } ( x ) \cdot f ^ { \prime \prime } ( x ) \)

d) \( \left\{\begin{array}{l}\sqrt{x+y}+2=x+1 \\ 2 x-y=5\end{array}\right. \)

(e) \( 4+(-5)^{2}-\left(5^{2}\right) \)

Ejercicios Encontrar el ualor nomérico de cada polinomio si \( a=\frac{1}{2} ; b=-3 ; c=\frac{1}{3} ; d=-1 \) \( \begin{array}{ll}\text { 1) } 3 a+2 b & \text { 4) }-4 d+a \\ \text { 2) } 3 c+3 d & \text { 5) } a^{2}+b^{2} \\ \text { 3) } c^{2}+5 & \text { 6) } 7 d^{5}-b\end{array} \)