ElectricPavlov

5x / 8x

(5x+2) / (8x+2) = 2/3      cross multiply

15x+6 = 16x+4

2= x   

5x= 10   8x = 16    

They both travel for 9 hours and total 792 km   when they meet

x=speed of car 1

x+8 = speed of car 2

rate x time = distance

9 (x)  + 9 (x+8) = 792    solve for x

18x = 720

x = 40 km/hr     Speed of car 2 = 40 +8 = 48 km/hr

They traveled for 9 hours (each)

9 hr x 40 km/hr = 360 km (car 1)       9 hr x 48 km/hr = 432 km (car 2)

Each of the sets of 4 angles should add to a total of 360  for a convex quadrilateral,,,,so your answer is correct.

her next five stops is on the???  floor or higher?

Do you have diagrams for these questions???  

DO you have a QUESTION with which we may be able to help you?   

2400 sq ft / 45 minutes/12 members  =   4.44 sq ft / min/member   (each member can  paint 4.44 sqft/min)

3600 sq ft   /  ( 4.44 sqft/min/mem   *   9 members)  = 90 mins

Welclome! 

Double oops!    See tertre 's answer......

23 x 2  / 2 = 23 handshakes !

8 x 40 = 320 m^2    =  

320 m^2   /  (.3048 m/f )^2 =  3444.45 ft^2

3444.45 ft^2 / 400 ft^2/gal  =  8.61 gal =~ 9 gallons of paint required