De=4x+10,ef=2x-1,and df=9x-15 find df

DF = 57

Step-by-step explanation:

From the given information on the line segments we can write the equation

DF = DE + EF ( substituting the values into the equation )

9x - 15 = 4x + 10 + 2x - 1

9x - 15 = 6x + 9 ( subtract 6x from both sides )

3x - 15 = 9 ( add 15 to both sides )

3x = 24 ( divide both sides by 3 )

x = 8

DF = 9x - 15 = (9 × 8) - 15 = 72 - 15 = 57

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