Use the given data to find the best predicted value of the response variable. Six pairs of data yield r = 0.789 and the regression equation Also, What is the best predicted value of y for x = 5? Use α = 0.05

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

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !