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Iteru [2.4K]
2 years ago
9

Pls help answer i dont not need explaination :)

Mathematics
2 answers:
nadezda [96]2 years ago
3 0

Answer:

165 km ^2

Step-by-step explanation:

meriva2 years ago
3 0

Answer:

165 km²

Step-by-step explanation:

<u>First, let us find the area of the big rectangle.</u>

Area = length × Width

Area = 15km × 13 km

Area = 195 km²

<u>Now, let us find the area of the small rectangle.</u>

Area = length × width

Area = 6 km × 5 km

Area = 30 km²

<u>And now, let us find the area of the shaded region.</u>

<em>For that, we have to subtract the area of the small rectangle from the area of the big rectangle.</em>

Area = 195 km² - 30 km²

Area = <u>165 km²</u>

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Point B has coordinates ​(​1,2​). The​ x-coordinate of point A is -8. The distance between point A and point B is 15 units. What
Xelga [282]

Answer:

The possible coordinates of point A are A_{1} (x,y) = (-8, 14) and A_{2} (x,y) = (-8, -10), respectively.

Step-by-step explanation:

From Analytical Geometry, we have the Equation of the Distance of a Line Segment between two points:

l_{AB} = \sqrt{(x_{B}-x_{A})^{2} + (y_{B}-y_{A})^{2}} (1)

Where:

l_{AB} - Length of the line segment AB.

x_{A}, x_{B} - x-coordinates of points A and B.

y_{A}, y_{B} - y-coordinates of points A and B.

If we know that l_{AB} = 15, x_{A} = -8, x_{B} = 1 and y_{B} = 2, then the possible coordinates of point A is:

\sqrt{(1+8)^{2}+(2-y_{A})^{2}} = 15

81 + (2-y_{A})^{2} = 225

(2-y_{A})^{2} = 144

2-y_{A} = \pm 12

There are two possible solutions:

1) 2-y_{A} = -12

y_{A} = 14

2) 2 - y_{A} = 12

y_{A} = -10

The possible coordinates of point A are A_{1} (x,y) = (-8, 14) and A_{2} (x,y) = (-8, -10), respectively.

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Answer:

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Answer:

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Step-by-step explanation:

(-7x^2 - 3) + (4x - 6)

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Answer:

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Step-by-step explanation:

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Mel would need 12 litres of blue paint, but she only has 9 litres.  So the amount of yellow paint she needs is:

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Mel will use 22.5 litres of yellow paint with 9 litres of blue paint to make a total of 31.5 litres of green paint.

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