Which pair of numbers is relatively prime?
a: 7 and 21
b: 4 and 15
c: 6 and 9
d: 9 and 27

If angle 2=3x +1 and angle 3=2x +4what is angle 2

The sum of two numbers is 12 and their difference is 18 what are the two numbers

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.