1. Classify the following algebraic expressions as monomials, binomials, trinomials or polynomials.
(i)7x (ii)5y - 7z (iii)3x3-5x2 - 11 (iv)1 - 8a - 7a2 - 7a3 (v)5m - 3 (vi)a (vii)4 (viii)3y2 - 7y+5
2. Add.
(i) 9p + 16q ; 13p + 2q
(ii) 2a + 6b + 8c; 16a + 13c + 18b
3. Subtract the second expression from the first.
(i) (4xy - 9z);(3xy - 16z)
(ii) (5x+4y+7z);(x+2y+3z)
4. If 7 kg onions cost 140 rupees, how much must we pay for 12 kg onions?
5. If 600 rupees buy 15 bunches of feed, how many will 1280 rupees buy?
