Hair is a inherited trait. In Marci's family, her mother has brown hair. Her father has blond hair. The family has 6 children in all. Of the 6 children, 1/3 of them have blond hair, 1/6 or them have red hair, and 1/2 of them have brown hair. What fraction of the children have red or brown hair?

4/6 or 2/3

Step-by-step explanation:

Okay so the amount of children in this problem is 6.

So, the denominator of the fraction should be 6.

The amount of children with red hair is 1/6, this already has a denominator of 6.

The amount of children with brown hair is 1/2, the denominator is not 6 so we have to change it. To change the denominator you have to multiply the top and the bottom number that will get you the right denominator.

EX: 1/2 x 3/3 = 3/6  1 x 3 = 3 for the top and 2 x 3 = 6 for the bottom.

So the amount of children with brown hair is 3/6.

Now the question ask for the fraction of children with red or brown hair. So for this you would add the two fraction together to get your final fraction.

So, 1/6 + 3/6 = 4/6

If your answer needs to be reduced then you can divide them both by the same number

EX: 4/6 ÷ 2/2 = 2/3

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m