In an international track competition, there are five united states athletes, four russian athletes, three french athletes, and one german athlete. how many rankings of the 13 athletes are there when

1. only one nationality is counted?

2. only nationality is counted and all the U. S athletes finish ahead of all the Russian athletes

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6

answer:   x*94 +688*6   = 267*100

94x+4128=26700    

94x=22572     /94

x=240.128

step-by-step explanation: mark as brainlest reallly need it thx