Answer: (1, -2, -6); sqrt41
Step-by-step explanation:
Side b is adjacent to the 30° angle so use cosine to solve. (soh cah toa)
cos(30°) = b/12
12*cos(30°) = b
cos(30°) is √(3)/2
12*(√(3)/2 ) = b
6√(3) = b
3 goes in the box
Answer:
Given the expression -3 - 4(2x- 3) the correct solution is -8x + 9.
Step-by-step explanation:
Andy wrote -14x + 21, so his error was to do de substraction (-3 -4) and then distribute -7(2x-3) = -14x+ 21.
Sylvie wrote -8x -6. Her error was to multiplied -4 only for 2x,
then -3 - 4(2x -3) = -3 -8x -3 = -8x -6.
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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