How do i compare numerical expressions without calculating them

To do that you need to notice the difference between the given expressions. Take the following case as an example: 10*40 and 20*40. The second expression is double than the first one because 20 is double than 10.

Another example:

20*2 and 10*2 + 10*2

These expressions are equal because 20 can be expressed as 10 + 10; then, distributing the multiplication gives the second expression.

the answer is 3/5

step-by-step explanation:

first divide 24 divided by 8 because that is the least common multiple

then divide 40 by 8

then you will get 3/5.

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%