Question

Evaluate and match each expression on the left to its value on the right, when and .

Answer 1

GIVEN

Four expressions in terms of x and y where

`\begin{gathered} x=6 \\ y=5 \end{gathered}`

SOLUTION

Expression 1:

`12+x`

Substitute x = 6 into the expression:

`12+x=12+6=18`

Expression 2:

`3x+y`

Substitute for x and y into the expression:

`3(6)+5=18+5=23`

Follow the same pattern for the other two expressions:

`\begin{gathered} 4y-10=4(5)-10=20-10=10 \\ (1)/(2)xy=(1)/(2)\cdot6\cdot5=(30)/(2)=15 \end{gathered}`

ANSWER

`\begin{gathered} 12+x=18 \\ 3x+y=23 \\ 4y-10=10 \\ (1)/(2)xy=15 \end{gathered}`