Solve by taking the square root of both sides

3(х+3)- 81 - 0

а х--3-33 or – 3+ 3/3

b. х--3-6/3 от -3+63

3-3.3 or 3+ 3.3

x-3-33 or –3+ 3/3

Please select the best answer from the choices provided

ОА

ооо

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%)