Simplify the expression. write the answer using scientific notation. the quantity 0.4 multiplied by 10 raised to the power of negative 6 end of quantity multiplied by the quantity 0.7 multiplied by 10 raised to the power of negative 2 end of quantity. a. 2.8 × 10–8 b. 2.8 × 10–7 c. 0.28 × 10–9 d. 2.8 × 10–9

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

~

ratio is 2 : 9

the answer is three

13.5 : 3