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

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Unions and intersections of sets

Full solution

Q. Evaluate

8p +3q-18

, when

p=\frac{1}{2}

and

q=7

.

Substitute Values: Substitute the given values of $p$ and $q$ into the expression. $\newline$ We have $p = \frac{1}{2}$ and $q = 7$ . The expression is $8p + 3q - 18$ . Let's substitute the values: $\newline$ $8 \times \left(\frac{1}{2}\right) + 3 \times 7 - 18$
Perform Multiplication: Perform the multiplication for each term. $\newline$ Now we calculate each term separately: $\newline$ $8 \times \left(\frac{1}{2}\right) = 4$ $\newline$ $3 \times 7 = 21$ $\newline$ So the expression becomes: $\newline$ $4 + 21 - 18$
Add and Subtract: Add and subtract the numbers to find the value of the expression. $\newline$ Now we add and subtract the numbers: $\newline$ $4 + 21 = 25$ $\newline$ $25 - 18 = 7$ $\newline$ So the value of the expression is $7$ .

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