Exercise 13B
Question 1
Find the value of each expression using the given values.
(i) $\frac{a b}{c}$ if $a=5, b=6$ and $c=10$
(ii) $\frac{x}{3}+8 y$, if $x=24$ and $y=2$
(iii) $2 x-y+3 z$, if $x=4, y=7$ and $z=2$
(iv) $\frac{p+6 q}{5 p-3 q}$, if $p=6$ and $q=2$
Question 2
If $x=3, y=2$ and $z=5$, find the value of
(i) $\frac{x^{2}}{9}+\frac{z^{2}}{25}$
(ii) $x^{2} y+x y^{2}$
(iii) $6(x+3 y)-(5 z-x)$
Question 3
What is the value of $3 x+4 y-6$, when $x=2 \frac{1}{3}$ and $y=4 \frac{3}{4}$ ?
Question 4
Evaluate $3 a+2 b+c$, when $a=1.2, b=3.7$ and $c=1.4 ?$
Multiple Choice Question (MCQ)
Tick (✔) the correct option.
Question 5
The value of $b-a-8$ when $b=-3$ and $a=-11$ is
(a) $-22$
(b) 16
(c) 0
(d) $-16$
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