For large parties, a restaurant adds a 15% service charge to the bill. how much would be added to a bill of $638.40?

Service charge  added to a bill of $638.40 is $95.76 .

Step-by-step explanation:

As given

For large parties, a restaurant adds a 15% service charge to the bill.

Bill of the parties  is  $638.40 .

15% is written in the decimal form

= 0.15

Thus

Service charge = 0.15 × Bill of the parties .

                          = 0.15 × $638.40

                           = $ 95.76

Therefore service charge  added to a bill of $638.40 is $95.76 .

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x