Question 1 :
The cost of a chocolate is Rs (x + 4) and Rohit bought (x + 4) chocolates. If x = 10, find the amount paid by him.
Question 6 :
How many terms are there in the expression $0.3a – 0.6ab + 0.5b$ ?
Question 7 :
Carry out the multiplication of the expression : $a^2 – 9, 4a$
Question 8 :
How many monomials are there in the list? $x + y$, $1000$, $x + x^2 + x^3 + x^4$, $7 + y + 5x$, $2y – 3y^2$, $2y – 3y^2 + 4y^3$, $5x – 4y + 3xy$, $4z – 15z^2$, $ab + bc + cd + da$, $pqr$, $p^2q + pq^2$, $2p + 2q$
Question 10 :
Carry out the multiplication of the expression : $pq + qr + rp, 0$
Question 11 :
$3x (4x – 5) + 3$ ,find its values for x = 3.
Question 14 :
$a (a^2 + a + 1) + 5$ ,find its value for a = 0.
Question 15 :
State true or false. The factorisation done by using the distributive law (property) is called the common factor method of factorisation.
Question 17 :
Find the area of rectangle with the following pair of monomials as their length and breadth respectively : $(10m , 5n)$
Question 18 :
Add the expression: $l^2 + m^2$ , $m^2 + n^2$ , $n^2 + l^2$ , $2lm + 2mn + 2nl$
Question 19 :
Using the Identity (III) : $(a+b)(a-b) = a^2 - b^2$ ,find $(\frac{3}{2}m + \frac{2}{3}n)(\frac{3}{2}m - \frac{2}{3}n)$