Substitute Values: Substitute the given values of j and k into the expression.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.This gives us 7×0.5 for the term with j, and 8×0.25 for the term with k.7×0.5=3.58×0.25=2
Replace Calculated Values: Replace the terms with their calculated values in the expression.The expression now becomes 3.5+5−2.
Perform Addition and Subtraction: Perform the addition and subtraction in the expression.First, we add 3.5 and 5, which gives us 8.5. Then we subtract 2 from 8.5.8.5−2=6.5
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