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igor_vitrenko [27]
3 years ago
10

ABCD is a quadrilateral Calculate the value of x A=2x B=90 C=x D=3x

Mathematics
1 answer:
Sedaia [141]3 years ago
7 0

Answer:

X=45

Step-by-step explanation:

Sum of all angles is 360, so we have

2x+90+x+3x=6x+90=360

6x=270

X=45

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Marshall evaluates the expression 15.3 - 7.9 and gets an answer of 7.4.
d1i1m1o1n [39]

Answer:

C

Step-by-step explanation:

Anything less than 5 rounds down while 5 and anything more rounds up. Therefore...

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7.9 rounds to 8

7.4 rounds to 7

So, his answer is reasonable.

8 0
2 years ago
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jeka57 [31]
I think the answer would be

X=1.5
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6 0
3 years ago
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What is the axis of symmetry of the function f(x)= -(x+9)(x-21)
Vinil7 [7]

Answer:

The axis of symmetry is x = 6

Step-by-step explanation:

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x = 21

Now take the average of these two numbers.

(-9 + 21)/2

12/2

6

6 0
3 years ago
What is the sum of the rational expression below? 3x/x+2 + x/x+4
Darya [45]

Ans

Step-by-step explanation:

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PLEASE HELP WILL MARK BRAINLIEST The frequency f​ (in waves per​ second) and the wavelength w​ (in meters) of a sound traveling
marshall27 [118]

You gave us the speed and the frequency, and you need the wavelength.

You were also nice enough to remind us that (fqy)x(lng) = speed.

So . . . F x W = 343 m/s

Divide each side by F :

W = (343 m/s) / F

W = (343 m/s) / (240 / s)

W = (343/240) m

<em>W = 1.429 meters</em>

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