(2x^{2} + 4x+ 7)+(x^{2} - 5x-4)

3x^2 - x + 3

Step-by-step explanation:

To simplify first simplify everything in each of the parenthesis

When you do this nothing should be simplified because there isn't any like terms

Now the equation becomes 2x^2 + 4x + 7 + x^2 - 5x - 4

Lastly add 2x^2 and x^2, subtract 4x and 5x, subtract 4 from 7

This makes the equation 3x^2 - x + 3

9 x 8 divided by (5-3)=36

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