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Yakvenalex [24]
3 years ago
15

Look at picture, answer quick please

Mathematics
2 answers:
kodGreya [7K]3 years ago
4 0

Answer:

A

Step-by-step explanation:

multiply each thing in the parenthesis by -4

-4×3x = -12x

-4×-2x = 8x

-4×4y = -16

-12x + 8x - 16y

combine like terms

-4x - 16y

bija089 [108]3 years ago
3 0

Answer:

a

Step-by-step explanation:

-4x3=-12x

-4x-2=8x

-4x4=-16y

8+-12=-4x

-4x-16y

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Solve the equation <br> x + 10 = 20
Gnoma [55]
20-10=10 therefore X=10

10+10=20
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1 year ago
Suppose that the number of drivers who travel between a particular origin and destination during a designated time period has a
andrew11 [14]

Answer:

Step-by-step explanation:

Given that the number of drivers who travel between a particular origin and destination during a designated time period has a Poisson distribution with parameter μ = 20 (suggested in the article "Dynamic Ride Sharing: Theory and Practice"†).

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b) P(X>26) =1-F(26)\\= 1-0.9221\\=0.0779=0.078

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5 0
3 years ago
Identify the center and radius from the equation of the circle given below. x^2+y^2+121-20y=-10x
Tcecarenko [31]

Answer:

Center: (-5,10)

Radius: 2

Step-by-step explanation:

The equation of the circle in center-radius form is:

(x-h)^2+(y-k)^2=r^2

Where the point (h,k)  is the center of the circle and "r" is the radius.

Subtract 121 from both sides of the equation:

x^2+y^2+121-20y-121=-10x-121\\x^2+y^2-20y=-10x-121

Add 10x to both sides:

x^2+y^2-20y+10x=-10x-121+10x\\x^2+y^2-20y+10x=-121

Make two groups for variable "x" and variable "y":

(x^2+10x)+(y^2-20y)=-121

Complete the square:

Add (\frac{10}{2})^2=5^2 inside the parentheses of "x".

Add  (\frac{20}{2})^2=10^2  inside the parentheses of "y".

Add 5^2 and 10^2 to the right side of the equation.

Then:

(x^2+10x+5^2)+(y^2-20y+10^2)=-121+5^2+10^2\\(x^2+10x+5^2)+(y^2-20y+10^2)=4

Rewriting, you get that the equation of the circle in center-radius form is:

 (x+5)^2+(y-10)^2=2^2

You can observe that the radius of the circle is:

r=2

And the center is:

(h,k)=(-5,10)

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3 years ago
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