X + 9 = 2x - 8
x - 2x = -8 - 9
-x = -17
x = 17
BC = x = 17
Answer:
The figure will change by a factor of 2.25.
Step-by-step explanation:
When the lengths (1-dimensional) change by a factor 1.5 (the definition of <em>dilating </em>a figure), the area (2-dimensional) will change by a factor 1.5 to the power of the quotient of the values of the dimensions, which is 2/1 = 2. So the area will change by a factor of 1.5^2 = 2.25.
This is an example of the
difference of squares.

So to find the product of <span>(9y</span>²<span> – 4x)(9y</span>²<span> + 4x), we use the formula for the difference of squares.
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I think it's B and D because both of them will give you the same answer which is 2.71 but turn it into fraction.
You multiply -21 by 14 to find x, and that would be -21 x 14 = -294, and that is your answer.