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Fofino [41]
3 years ago
9

Is this statement true or false?

Mathematics
1 answer:
solniwko [45]3 years ago
5 0
It is true. The diameter of a circle is double the radius. :)
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The midpoint of AB is at (3,7) and A is at (0,-5). Where is B located?
olga nikolaevna [1]
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ \square }}\quad ,&{{ \square }})\quad 
%  (c,d)
&({{ \square }}\quad ,&{{ \square }})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)\qquad thus
\\
----------------------------\\\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
A&({{ 0}}\quad ,&{{ -5}})\quad 
%  (c,d)
B&({{ \square }}\quad ,&{{ \square }})
\end{array}\qquad
%   coordinates of midpoint 
(3,7)\impliedby midpoint\qquad thus
\\ \quad \\
\left(\cfrac{{{ x_2 }} + {{ 0}}}{2}=3\quad ,\quad \cfrac{{{ y_2 }} + {{( -5)}}}{2}=7 \right)\to 
\begin{cases}
\cfrac{{{ x_2 }} + {{ 0}}}{2}=3
\\ \quad \\
\cfrac{{{ y_2 }} + {{ -5}}}{2}=7
\end{cases}
\\ \quad \\
solve\ for\ x_2\ and\ y_2
3 0
3 years ago
A plane flying horizontally at an altitude of 3 mi and a speed of 440 mi/h passes directly over a radar station. find the rate a
Licemer1 [7]
The distance is increasing at a rate that is the speed of the plane multiplied by the cosine of the angle between its flight path and the direct line to the radar station. That cosine is 4/√(3²+4²) = 4/5, so the distance is increasing at
  440 mi/h × 4/5 = 352 mi/h
8 0
3 years ago
In which step does a mistake first occur?
kumpel [21]

Answer:

Step 3. 4 ÷ 2

Step 4. 2

these two steps are wrong

(24 ÷ 3 + 10) - 14 ÷ 2

(8 + 10) - 14 ÷ 2

(8 + 10) - 7

18 - 7

11

Note : See the explanation and get the answer

7 0
2 years ago
Read 2 more answers
1/9y + 1/8 = 1/6<br><br> Please help
tatyana61 [14]
The answer is 3/8 ur welcome :)
7 0
2 years ago
During second period Jeff completed a grammar worksheet , of the 76 question , Jeff got 25% right , how many questions did Jeff
lana [24]
I believe the answer is 19
7 0
3 years ago
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