X+y=-3 y=2x solve the linear equation

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove

*segment an is an altitude of right ? abc with a right angle at a. if ab = 2root 5 in and nc = 1 in, find bn, an, ac.

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.