What it 1 fifth plus 1 fifth?

What is the y-coordinate of the y-intercept of the line given by the equation y equals 5x plus 21? What is the decimal 26 fraction? What does a sign with two arrows pointing left and right mean? Why do your feet hurt when you walk barefoot in your house? How long is 2 mm? What percent decrease 36 to 24? Which four periods are represented in vivaldi's concerto opus numbers 1 to 4? What should be the next number in the following series 3 6 4 7 5 8? What is 3 and 3 tenths as a percent? If 4 sin tita -4 cos square tita plus 1 equals 0 then prove that root3 upon 2 equals 0? How many significant figures are in 6 times 105? Dividing by three fourths is just like multiplying by what? What is bigger 13 over 15 or 5 over 6? How much does a matrix cost? How many YouTube videos are there? What 1 ct t w diamond earring mean? What number has 9 tens and the same number of ones as tens? Is 1.442 greater then 1.5? 2 3 as a decimal? What is the significance of fire to christians?