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OverLord2011 [107]
3 years ago
14

-56 + _ =-84 please help

Mathematics
1 answer:
GaryK [48]3 years ago
4 0

Answer:

-28 is the answer.

Step-by-step explanation:

84-56=28

56+28=84

-56+-28=-84

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What is the equation of a circle with center (-3, -1) that contains the point (1, 2)?
Leno4ka [110]
So, we know the center is at -3,-1, ok

hmmm what's the radius anyway?   well, we know that there's a point at 1,2 that is on the circle's path...hmmmm what's the distance from the center to that point?  well, is the radius, let's check then.

\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ -3}}\quad ,&{{ -1}})\quad 
%  (c,d)
&({{ 1}}\quad ,&{{ 2}})
\end{array}\qquad 
%  distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
r=\sqrt{[1-(-3)]^2+[2-(-1)]^2}\implies r=\sqrt{(1+3)^2+(2+1)^2}
\\\\\\
r=\sqrt{16+9}\implies r=\sqrt{25}\implies r=5

so, what's the equation of a circle with center at -3, -1 and a radius of 5?

\bf \textit{equation of a circle}\\\\ 
(x-{{ h}})^2+(y-{{ k}})^2={{ r}}^2
\qquad 
\begin{array}{lllll}
center\ (&{{ h}},&{{\quad  k}})\qquad 
radius=&{{ r}}\\
&-3&-1&5
\end{array} 
\\\\\\\
[x-(-3)]^2+[y-(-1)]^2=5^2\implies (x+3)^2+(y+1)^2=25
7 0
3 years ago
What is the perimeter of a square if the area is 144cm2
Alex
48 centimeters is the answer
5 0
3 years ago
Help me do this! Pleaseeeeeeeeeeee
Mariulka [41]

Answer:

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Step-by-step explanation:

Perimeter is just adding all of the sides' lengths together, so we can put all of them into one big equation and then combine like terms.

p=x+(2x+5)+(6x-17)+(3x+2)\\p=12x-10

Hope this helps!

7 0
3 years ago
Evaluate 14 y / 2 for y equals 6​
ad-work [718]

Answer:

42

Step-by-step explanation:

Now we know that y=6, change the y to 6. Then solve, 14x6 is 84, and 84 divided by 2 is 42.

7 0
3 years ago
Please help me with the question answer it please .
Oksi-84 [34.3K]

Answer:

The numerator will always be Positive.

Step-by-step explanation:

I don't know if I am right but I am pretty sure I am if I am wrong then it is Negative

3 0
3 years ago
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