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Evaluate $7j + 5 - 8k$ when $j= 0.5$ and $k= 0.25$

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Unions and intersections of sets

Full solution

Q. Evaluate

7j + 5 - 8k

when

j= 0.5

and

k= 0.25

Substitute Values: Substitute the given values of $j$ and $k$ into the expression. $\newline$ We have $j = 0.5$ and $k = 0.25$ , so we substitute these values into the expression $7j + 5 - 8k$ .
Perform Multiplication: Perform the multiplication for each term with a variable. $\newline$ This gives us $7 \times 0.5$ for the term with $j$ , and $8 \times 0.25$ for the term with $k$ . $\newline$ $7 \times 0.5 = 3.5$ $\newline$ $8 \times 0.25 = 2$
Replace Calculated Values: Replace the terms with their calculated values in the expression. $\newline$ Now the expression becomes $3.5 + 5 - 2$ .
Perform Addition and Subtraction: Perform the addition and subtraction in the expression. $\newline$ First, we add $3.5$ and $5$ , which gives us $8.5$ . Then we subtract $2$ from $8.5$ . $\newline$ $8.5 - 2 = 6.5$

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