Whats the probability of a coin landing heads up 2 times in a row

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Describe a situation that you could represent with the inequality x< 17

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.