$81 {x}^{2} - 324 {y}^{2} \\ \\ = {(9x)}^{2} - {(18y)}^{2} \\ \\ = (9x + 18y)(9x - 18y) \\ \\ = 9(x + 2y) \times 9(x - 2y) \\ \\ = 81(x + 2y)(x - 2y)$

7 0

2 years ago

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What is the slope of a line parallel to the line whose equation is 4x-y=-4

HACTEHA [7]

Answer:

-y= -4x -4

y= 4x +4

slope is 4

Step-by-step explanation:

8 0

1 year ago

The weight of an object on a particular scale is 142.2 lbs the measured weight may vary from the actual weight by at most 0.3 lb

algol13

Answer:

144.9 <= x <= 145.5

Step-by-step explanation:

145.2 + 3 = 145.5

145.2 - 3 = 144.9

144.9 <= x <= 145.5

3 0

2 years ago