3. Let \( X \) and \( Y \) denote two sets. If \( X \subset Y \) simplify each of the following as far as possible and where necessary, show the results in a Venn diagram. \( \begin{array}{lllll}\text { (a) } X \cap Y & \text { (b) } X \cup Y & \text { (c) } X^{\prime} \cap Y^{\prime} & \text { (d) } X \cap Y^{\prime} & \text { (d) } X^{\prime} \cup Y^{\prime}\end{array} \)

Si la suma de das números es 50 y lo razón entre elios es de 3.7 , acuáles son los dos nü meros?

1) Un triangolo rettangolo ha l'area di \( 864 \mathrm{~cm}^{2} \) e l'al- tezza relativa all'ipotenusa lunga \( 28,8 \mathrm{~cm} \). Calcola il perimetro del triangolo.

Example 12 You need R 105000 in 12 years' time. How much money should you invest now if your investment earns simple interest at \( 12,25 \% \) per year?

Correct the mistakes in the sentences. is getting 0 My cousin gets married today. 1 How are you? I write to you to give you some news. 2 What do you do at the moment? 3 My brother and I are not going swimming every day. 4 My mom is only working in the mornings. 5 Welusually are eating a big breakfast on Sunda

3. \( T(t)=t i \# t^{2} j+\frac{t^{2}}{2} K \)