Please help ! I need to figure out how 1 gets to 2 and how three gets to four :( I will give you brainliest!!!

Which of the following of the following sets of side lengths could not form a triangle?

On the first of each month, shelly runs a 5k race. she keeps track of her times to track her progress. her time in minutes is recorded in the table: jan 40.55 july 35.38 feb 41.51 aug 37.48 mar 42.01 sept 40.87 apr 38.76 oct 48.32 may 36.32 nov 41.59 june 34.28 dec 42.71 determine the difference between the mean of the data, including the outlier and excluding the outlier. round to the hundredths place. 39.98 39.22 0.76 1.21

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7