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3 years ago

Pls someone pls help me with this question pls

Mathematics

1 answer:

Airida [17]3 years ago

7 0

Answer:

C) 140

Step-by-step explanation:

You will need to find angles 1, 2 and 3 to get 4

Angle 3 is on the same line as 6 and supplementary, forming 180.

Therefore, substract angle 6 from 180 to get 3

180 = Angle 6 + Angle 3

180 - 120 = Angle 3

60 = Angle 3

Angle 2 is the same concept

180 - 100 = 80

80 = Angle 2

Angle 1

All angles in the triangle are 180, therefore, angle 1 is found using

180 - Angle 2 -Angle 3 = Angle 1

180 - 80 - 60 = Angle 1

40 = Angle 1

And since Angle 1 and 4 are on the same line, supplemantary and forming 180, substract angle 1 from 180 to get angle 4

180 = Angle 1 + Angle 4

180 - 40 = Angle 4

140 = Angle 4

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Ainat [17]

Answer:

To solve this you would do the following:

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6 0

3 years ago

Identify the radius and center.<br><br> x^2 + y^2 - 2x + 4y - 11 = 0

miss Akunina [59]

<h2>Hello!</h2>

The answer is:

Center: (1,-2)

Radius: 4 units.

To solve the problem, using the given formula of a circle, we need to find its standard equation form which is equal to:

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

Where,

"h" and "k"are the coordinates of the center of the circle and "r" is its radius.

So, we need to complete the square for both variable "x" and "y".

The given equation is:

$x^2+y^2-2x+4y-11=0$

So, solving we have:

$x^2+y^2-2x+4y=11$

$(x^2-2x+(\frac{2}{2})^{2} )+(y^2+4y+(\frac{4}{2})^{2})=11+(\frac{2}{2})^{2} +(\frac{4}{2})^{2}\\\\(x^2-2x+1)+(y^2+4y+4)=11+1+4\\\\(x^2-1)+(y^2+2)=16$

$(x^2-1)+(y^2-(-2))=16$

Now, we have that:

$h=1\\k=-2\\r=\sqrt{16}=4$

So,

Center: (1,-2)

Radius: 4 units.

Have a nice day!

Note: I have attached a picture for better understanding.

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4 years ago

For the line described by y = -4/3x - 7 what is the Y intercept and Slope

marysya [2.9K]

Slope -- -4/3
y intercept --- -7
hope this helps!

8 0

4 years ago

Read 2 more answers

78 – 24 divided by (14 – 6) x 2

RideAnS [48]

Answer:

76.5

Step-by-step explanation:

pls brainliest

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3 years ago

What is 31; can vary by 7% ?

Black_prince [1.1K]

9514 1404 393

Answer:

28.83 ≤ x ≤ 33.17

Step-by-step explanation:

7% of 31 is ...

0.07 × 31 = 2.17

When we say the value can vary from 31 by 7%, we usually mean it can go that much lower or higher. For some value x, this means ...

31 -2.17 ≤ x ≤ 31 +2.17

28.83 ≤ x ≤ 33.17

5 0

3 years ago