Question

evaluate $8p + 3q - 18$ when $p = \frac{1}{2}$ and $q = 7$.

Explanation:

Step1: Substitute \( p = \frac{1}{2} \) and \( q = 7 \) into the expression

\( 8\times\frac{1}{2}+3\times7 - 18 \)

Step2: Calculate each term

First term: \( 8\times\frac{1}{2}=4 \)
Second term: \( 3\times7 = 21 \)

Step3: Combine the terms

\( 4 + 21-18 \)

Step4: Perform the arithmetic operations

\( 25 - 18=7 \)

Answer:

\( 7 \)