3 Customers at ath loe cream shop took a survey. The results showed that 144 customers noted the shop as being very satisfactory" This number represented \( 45 \% \) of the total number of customers who took the survey. What was the total number of eustomers who took the survey?

5. Problema de Comida: En una fiesta, hay \( x \) personas. Cada persona trae 3 bocadillos. Si se han traído un total de 27 bocadillos, ¿cuántas personas hay en la fiesta? - Ecuación: \( 3 \mathbf{x}=\mathbf{2 7} \)

\( 3\sqrt {-\frac{1}{8}}(-\frac{8}{9}).(-\frac{27}{2})+(-\frac{1}{3})\div \frac{23}{10} \)

Factorise fully \( 2 x^{2}+13 x+15 \)

Factorise fully the expression \( 7 t^{2}+2 t-9 \)

Write the following in simplified radical form. \( \sqrt[3]{24 y^{11}} \)