Subtract the following using the number line.
(i) –3 – (–2) 
(ii) +6 – (–5)

A submarine is at 300 feet below the sea level. If it ascends to 175 feet, what is its new position?

A shopkeeper earns a profit of Rs. 5 by selling one notebook and incurs a loss of Rs. 2 per pen while selling of his old stock. In a particular day he earns neither profit nor loss. If he sold 20 notebooks, how many pens did he sell?

Find the area of the rhombus whose side is 17 cm and the height is 8 cm.

Calculate the area of the rhombus having diagonals equal to 6 m and 8 m.

i) Add: 3x − 4y + z and 2x − z + 3y
ii) Subtract 2x − 5y from 4x + 3y

Simplify 3x - 5 - x + 9 if x = 3

60 workers can spin a bale of cotton in 7 days. In how many days will 42 workers spin it?

(i) Name the angle that corresponds to \(\angle\)1.
(ii) Name the angle that is alternate interior to \(\angle\)3.
(iii) Name the angle that is alternate exterior to \(\angle\)8.
(iv) Name the angle that corresponds to \(\angle\)8.
(v) Name the angle that is alternate exterior to \(\angle\)7.
(vi) Name the angle that is alternate interior to \(\angle\)6.

If l is parallel to m, find the measure of x and y in the figure.