Hi, i am 2 -digit number. my tens is 2 more than my ones. what numbers can i be?

Jen & jeff left their home at the same time for their seperate vacation. jen drove east at an average rate of 75km/h and jeff drove west at an average rate of 60km/h. in how many hours will they be 810 km apart?

three identical circles each have an area of 219 cm2. when the circlesoverlap each other partially, the total area becomes 500 cm.if s. = 30 cm? , find the value of s1 + s2 + sz. ​

What is 2x2 and why ? explain in 3 sentences