Part b: simplify the expression -6-4. is the
result the same as simplifying the expression
(-6)-4. explain.
pls fast

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

With both problems. a.s.a.p directions on photo ^

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%)