Answer: Doubling the red marbles means that each 2 red marbles will be replaced by 4 red marbles. So after doubling the red marbles for each 3 blue marbles there will now be 4 red marbles, giving a new ratio of 3:4.
(5x^2 + x - 4)(x + 2) = x(5x^2 + x - 4) + 2(5x^2 + x - 4) = 5x^3 + x^2 - 4x + 10x^2 + 2x - 8 = 5x^3 + 11x^2 - 2x - 8
Answer:
1. Movie B
2. Movie C
3. 40 years old
Step-by-step explanation:
There was 33.3% error in her calculation.
Step-by-step explanation:
Approx value thought by Lauren = 100
Exact value counted = 75
Percent error = 

Rounding off to nearest tenth;
Percent error = 33.3%
There was 33.3% error in her calculation.
Keywords: percentage, error
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