Answer: correct is B
Step-by-step explanation:
Annex the bar graph that shows which improvement time is less, the new formula being more effective, with an average of 55 minutes and the average of the old formula is 75 minutes, which leads to the conclusion that the new formula is better than the previous one with a time difference of 20 minutes.
Answer:
Step 3: x² + 6x + 64 = -8 + 64
Step-by-step explanation:
At step 3 add 64 on both sides to complete the square.
so x² + 6x = -8
becomes x² + 6x + 64 = -8 + 64 when 64 is added both sides giving us step 3.
continuing from there, we get
x² + 6x + 64 = 56
we then use a² + 2ab + b² = (a + b)² on the left side to get
(x + 8)² = 56 (solve the equation for x)
by taking the root on both sides
√(x + 8)² = √56
x + 8 = +- 2√14 (separate the equations
x + 8 = 2√14
x + 8 = -2√14
Solving for x
x = 2√14 - 8 or x = -2√14 - 8
Answer:
-5/24
Step-by-step explanation:
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