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

18

step-by-step explanation:

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51-50

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116