Richard and teo have a combination age of 31. richard is 4 years older than twice teo's age. how old are richard and teo?

What is the midpoint of the segment below? (-4,-7) (5,6)

What is the measure of x, in degrees

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!