What does the expression 0.90(d – 5) refer to? How do you know? How else
could this expression be written?
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The expression 0.90(d - 5) refers to the result of multiplying 0.90 by the quantity (d - 5). This can be interpreted as taking 90% of the difference between d and 5.
I know this because the expression contains the term (d - 5) within parentheses, which indicates that whatever value d represents, it is subtracted by 5 before being multiplied by 0.90.
This expression could also be written as 0.90d - 4.50 or as 9/10(d - 5).
make it longer
The expression 0.90(d - 5) refers to the result of multiplying 0.90 by the quantity (d - 5), which represents the difference between the value of d and 5. In other words, it is a mathematical representation of taking 90% of the difference between d and 5.
This can be further broken down to understand its meaning. By subtracting 5 from the value of d, we determine the difference between d and 5. Multiplying this difference by 0.90 scales it down to 90% of its original value, resulting in a final value equal to 90% of the difference between d and 5.
The presence of 0.90 as the coefficient of the expression indicates that we are scaling the value of (d - 5) down by a factor of 0.90 before obtaining the final result. The coefficient 0.90 can be interpreted as a fraction, 9/10, representing 90%.
Additionally, this expression can be written in alternative forms to convey the same meaning. It can be expanded as 0.90d - 4.50, representing 90% of d minus 90% of 5, which is equivalent to 90% of the difference between d and 5. Alternatively, it can be expressed as (9/10)(d - 5) to denote taking 90% of the difference between d and 5 using a fraction representation.
make it clear and easy
The expression 0.90(d - 5) refers to taking 90% of the difference between a value d and 5.
To understand this expression, first subtract 5 from the value of d, which gives you the difference between d and 5. Then, multiply this difference by 0.90 to get 90% of that difference.
So, 0.90(d - 5) means you are calculating 90% of the difference between d and 5.
Another way to write this expression is 0.90d - 4.50, which still represents 90% of d minus 90% of 5. And you can also write it as (9/10)(d - 5) to show that it is 90% of the difference between d and 5, using a fraction.