Question

Evaluate and match each expression on the left to its value on the right, when X=7 and Y=4

Answer 1

Given that

$x=7,y=4$

To Determine: The equivalent numbers to each of the expressions

Solution:

(a)

$\begin{gathered} 12+x,x=7 \\ 12+7=19 \end{gathered}$

(b)

$\begin{gathered} 3x+y,x=7,y=4 \\ 3(7)+4 \\ 21+4=25 \end{gathered}$

(c)

$\begin{gathered} 4y-10,y=4 \\ 4(4)-10 \\ 16-10=6 \end{gathered}$

(d)

$\begin{gathered} \frac{1}{2}xy| \\ =\frac{1}{2}\times7\times4 \\ =\frac{28}{2} \\ =14 \end{gathered}$