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Sveta_85 [38]
3 years ago
14

HELP ME PLESE ,3 I NEED THIS

Mathematics
1 answer:
Trava [24]3 years ago
5 0

Answer:

270°

Step-by-step explanation:

m\widehat{BC} = 360\degree - (146\degree + 90\degree) \\m\widehat{BC} = 360\degree -236\degree \\m\widehat{BC} = 124\degree \\\\m\widehat{ABC} =m\widehat {AB} + m\widehat {BC} \\m\widehat{ABC} =146\degree + 124\degree \\\huge \red {\boxed {m\widehat{ABC} =270\degree}} \\

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If A = pi*r^2, and we wish to solve for r, then divide both sides by pi:

A/pi = r^2

Taking the square root of both sides,   sqrt(A/pi) = r (r must be positive in this situation).
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3 years ago
The length of a rectangle is 5 centimeters less then twice it's width. The perimeter of the rectangle is 26 cm. What are the dim
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Answer:

The dimensions of the rectangle are length = 7cm and width = 6cm.

Step-by-step explanation:

In order to solve for the dimensions, you will need to set up two equations in order to solve for the missing variable.  Given the information that the length is 5 cm less then twice it's width, using 'L' for length and 'w' for width we get the following equation:  L = 2w - 5.  Perimeter is the sum of all the sides, or in the case of a rectangle P = 2w + 2L.  We can then use our expression for 'L' in our perimeter formula:  26 = 2w + 2(2w - 5).  First, using the distributive property we get: 26 = 2w + 4w - 10.  Next, we combine like terms:  26 = 6w - 10.  Then, we use inverse operations to isolate the variable:  26 + 10 = 6w - 10 + 10 to get 36 = 6w, divide both sides by 6 to get w = 6.  Lastly, plug in the value of 'w' to 'L':  L = 2(6) - 5 or L = 7.

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3 years ago
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3 years ago
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