Substitute 5 for x and evaluate the expression 4x - 2

4x -2

substitute 5 for x

4(5)-2

20-2

18

In this case we have an equation of the form

If we have , we must find the value of y, in this way we have:

We solve the multiplication:

We know that different signs are subtracted and the sign of the major is placed:

So, when then

The result of evaluating the given expression at is:

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5