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

Explanation:

Step1: Substitute p value

Substitute $p = \frac{1}{2}$ into $8p$: $8\times\frac{1}{2}=4$.

Step2: Substitute q value

Substitute $q = 7$ into $3q$: $3\times7 = 21$.

Step3: Calculate the expression

$8p+3q - 18=4 + 21-18$. $4+21-18=25 - 18=7$.

Answer:

$7$