Which shows the best use of the associative and commutative properties to make simplifying 3/4– 5+ 9 - 2/4 + 2 easier?

O A. (+()] + [9+2+(-5)]
O B. (+9+(-5)] + [2+(-3)]
O c. (+(-5)] + [9+(-x) + 2]
O D. (2++(-5)] + [(-k) +9]

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Aregular hexagon has sides of 2 feet. what is the area of the hexagon? 12 ft2 12 ft2 24 ft2 6 ft2

Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol