Simplify, answerwrite with positive exponents: fraction numerator negative 8 a to the power of 5 space b to the power of 9 space c over denominator 2 space a to the power of 3 space end exponent b to the power of 8 space c to the power of negative 3 end exponent end fraction(review 5.2) Simplify (-5x3) (6x9) (Review 5.1) The mass of an electron is about 9.11 x10-28 grams. Write this and standard form. (Review 5.2) Combine: (3n3 +7n -2) + (12n3 -3n +9) (review 5.3) Michelle wanted to replace the floor of her living room. She measured the width of a living room as (4x + 7) feet and the length as (2x + 9). What is the area of the living room? (Review5.4) Combine: left parenthesis 1 third x squared space minus space 5 over 6 x space plus 3 over 4 right parenthesis space minus left parenthesis 7 over 12 x squared space plus space 1 half x space minus 2 over 3 right parenthesis (Review 5.3) Multiply : left parenthesis x minus 2 right parenthesis space left parenthesis 2 x minus space 4 right parenthesis space left parenthesis x plus space 6 right parenthesis