Multiply. (a−4)(a+3)a2−4a⋅2a2(a+3)(a−1)

2aa−1

2a2a−1

2a−1

2aa+1

Need solving this second acceleration problem.

What is the length and width of a 84.5 square foot rug? will mark

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%)