Of the 7.0 billion people who lived in the world, about 1.3 billion live in china. find at least 3 more real world numbers that are expressed as decimal millions or billions. Tell what each number describes.

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

the answer will be the last one

answer: median

step-by-step explanation:

the median is the middle value when a data set is ordered from least to greatest

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°