SOMEONE PLEASE HELP ME WILL GIVE BRAINLIEST

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.