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Nikolay [14]
3 years ago
5

Which expression is equivalent to 3(6m) + m? A. 19m B. 21m C. 7m + 3 D. 18m + 6m²

Mathematics
2 answers:
vlada-n [284]3 years ago
8 0
19m because 6 times 3 is 18. Plus 1 is 19
Lelechka [254]3 years ago
5 0

Answer:

3(6m)+m=18m+m=19m so your answer would be A. 19m

Step-by-step explanation:

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Quadrilateral ABCD is not a square. The product of slopes of its diagonals is not -1.

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Point A is (-4,6)

Point B is (-12,-12)

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Given that the diagonals of a square are perpendicular to each other;

We know that the product of slopes of two perpendicular lines is -1.

So, slope(m) of AC × slope(m) of BD should be equal to -1.

Slope of AC = (Change in y-axis) ÷ (Change in x-axis) = (-18 - 6) ÷ (6 - -4) = -24/10 = -2.4

Slope of BD = (Change in y-axis) ÷ (Change in x-axis) = (-1 - -12) ÷ (13 - -12) = 11/25 = 0.44

The product of slope of AC and slope of BD = -2.4 × 0.44 = -1.056

Since the product of slope of AC and slope of BD is not -1 hence AC is not perpendicular to BD thus quadrilateral ABCD is not a square.

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