11. A three-person relay race consists of ten times around a football field. If Tomiko runs three and one-sixth times and Brianna runs two and two-thirds times around the field, how many times around the field does the third person have to run to finish the race?

Respuesta :

If Tomiko runs three and one-sixth times and Brianna runs two and two-thirds times around the field

Tomiko runs three and one-sixth times = [tex]3\frac{1}{6} =\frac{19}{6}[/tex]

Brianna runs two and two-thirds times =[tex]2\frac{2}{3} =\frac{8}{3}[/tex]

relay race consists of ten times around a football field

Tomiko  + Brianna + third person = 10

Let the third person is x

[tex]\frac{19}{6} + \frac{8}{3} +x = 10[/tex]

Take common denominator LCD, that is 6

Multiply the whole equation by 6

19 + 16 + 6x = 60

35 +6x = 60

6x = 25

[tex]x=\frac{25}{6} = 4\frac{1}{6}[/tex]

The third person have to run[tex]4\frac{1}{6}[/tex] times to finish the race