Fill in the blanks in the following statement.

The number (256)5/7 is .......... th root of .......... th power of .........

y varies inversely with x. If y = 30 when x = 12, find

(1) y when x = 15

(2) x when y = 18

Draw a line l. Draw a line parallel to line l at a distance of 3.5 cm.

E×pand.

(1) (5 ×-7) (5 ×-9)

(2) (2 ×-3 y)³

(3) (a + 1/2)³

Draw an obtuse angled triangle. Draw all of its medians and show their point of concurrence.