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sergij07 [2.7K]
4 years ago
13

-1=-3r+2r How can you write the steps to this problem?

Mathematics
1 answer:
Nesterboy [21]4 years ago
8 0

Answer:

r=1

Step-by-step explanation:

-1=-3r+2r

combine the similar variables:

-1=-1r

Isolate the variable by dividing by the reciprocal:

1=r or r=1

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Step-by-step explanation:

C=b^2/25

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b=+-5\sqrt{C}

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Answer:

Option (B). Perimeter of the quadrilateral ABCD= 14.6 units

Step-by-step explanation:

From the figure attached,

Coordinates of the vertices are A(3, 5), B(1, 3), C(3, -1), D(5, 3).

Length of AB = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}

                      = \sqrt{(3-1)^2+(5-3)^2}

                      = \sqrt{8}

                      = 2.83 units

Length of AD = \sqrt{(3-5)^2+(5-3)^2}

                      = \sqrt{8}

                      = 2.83 units

Length of BC = \sqrt{(1-3)^2+(3+1)^2}

                      = \sqrt{20}

                      = 4.47 units

Length of DC = \sqrt{(5-3)^2+(3+1)^2}

                       = \sqrt{20}

                       = 4.47 units

Perimeter of the quadrilateral = AB + AD + DC + BC

                                                 = 2.83 + 2.83 + 4.47 + 4.47

                                                = 14.6 units  

Option (B) is the answer.

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3 years ago
Can someone please help me with this
BARSIC [14]
I’m not 100% but my best guess is 20.
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