2(7m−5)+(−8+9m)=? Does anybody know what the answer to this question is?
If you know, please tell me. I'm really in a hurry.

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%)

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y

Here is another math questions. i will keep asking different questions. 4^2x=6