2 years ago

Solve (−7) ⋅ (−4). Please hurry :D -28 -11 28 11

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

5 0

Answer:

Step-by-step explanation:

$- (7) \times ( - 4) \\ - ( - 28) \\ - \times - = + \\ = 28$

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- Equal midpoints of AC and BC.

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Step-by-step explanation:

1. Plot the given points, as you can see in the graph attached.

2. Calculate the midpoint of AC and DB:

$M_{AC}=(\frac{-5+(-1)}{2},\frac{-1+5}{2})=(-3,2)\\M_{DB}=(\frac{-9+3}{2},\frac{6+(-2)}{2})=(-3,2)$

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4. Multiply the slopes of the diagonals:

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