3) 13 and 31 both are prime numbers. In both numbers, 1 and 3 are common. Now,

make four pairs of such prime numbers from 1 to 100.​

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Anyone know? will mark brainliest if you're correct!

What are the triple angle formulas? is it related to double angle identities?