Which value is in the domain of f(x)?
(2x + 5, -6 -2x + 3, 0 < x 54

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"