Answer:
There are no real factors for this.
Step-by-step explanation:
We could answer this either by checking each listed expression to see whether it is a factor of 9r^2-4r+1, or
We could take the coefficients of 9r^2-4r+1, determine the quantity b²-4ac (called the 'discriminant') and draw a conclusion based upon whether the discriminant is -, + or 0.
Let's use the 2nd approach.
Here, a = 9, b = -4 and c = 1.
Then the discriminant is b²2 - 4ac, or (-4)² - 4(9)(1), or 16 - 36.
Since 16 - 36 is negative, we conclude that this 9r^2 - 4r + 1 has NO REAL FACTORS.
Answer:
11
Step-by-step explanation:
Answer:
The answer to your question is letter D
Step-by-step explanation:
Letter A. It is not possible because it is necessary to considers the variable (number of weeks)and this option does not consider it.
Letter B. It is not possible besides it consider the number of weeks the results do not correspond with the conditions given.
Example: for week 1, the number of freckles is 10 + 2¹ = 10 + 2 = 12, and the number of freckles must be 20.
Letter C. It is incorrect because the numbers of freckles do not correspond with the conditions.
Example: week 2 f = 2(10) ² = 2(100) = 200, it is higher than the expected.
Letter D. This is the correct answer because it satisfied the conditions given.
Answer:
Step-by-step explanation:
Answer:
When you round 490.625 to the nearest tenth its 490.6.
