Simplifying polynomials
which polynomial correctly combines the like terms and puts the given polynomial in standard form?
}r+8: 8 -r
x- 2ܢ| - 8
:
8_0_
ܫܝܼܼ ܀ ܐܶܢ
ܫ -2ܨ
_o
_o
o

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%)