The diagram shows two rectangles, A and B. All measurements are in centimetres. The area of rectangle A is equal to the area of rectangle B. Find an expression for y in terms of w. 

Point \( C \) with coordinates \( (50,30) \) is mapped onto \( C^{\prime} \) through a translation by vector \( \langle-3,6\rangle \). What are the coordinates of \( C^{\prime} \) ? - \( (47,36) \) - \( (53,24) \) - \( (47,24) \) - \( (53,36) \)

1. \( A(4 ; 3 ;-2), \quad B(-3 ;-1 ; 4), C(2 ; 2 ; 1\} ; \) \( a=\overrightarrow{A B}, b=\overrightarrow{A C}, c=\overrightarrow{C B}, \quad d=2 c-5 b, \quad l=C B, \quad \alpha=4, \quad \beta=3 \) 2. \( a=5 m-3 n, \quad b=m+3 n, \quad|m|=1, \quad|n|=1, \quad \varphi=\frac{\pi}{2} \). 3. \( a=\{1 ; 3 ; 0\}, \quad b=\{2 ;-1 ; 1\}, \quad c=\{0 ;-1 ; 2\}, \quad d=\{6 ; 12 ;-1\} \).

wer the following questions: hoose the correct answer from the given ones : If the lengths of two sides of a triangle are 2 cm . and 5 cm ., then the perimeter of the triangle \( \in \)...........

Identify the measure of each interior angle of a regular 15 - gon.

If the radius of a sphere is doubled, how does the surface area change compared to the original surface area?