If a line segment has endpoint a(3x+5,3y) and b(x-1,-y), what are the coordinates of the mid point of line ab

Need on this geometry question. explain how you did it.

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28

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?