How do you Decompose 4/10 as the sum of unit fractions?

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start