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gregori [183]
3 years ago
8

Reflection (in Y)

Mathematics
1 answer:
Tanzania [10]3 years ago
7 0
(3;4) percent of the piano 4
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A spring has a natural length of 20 cm. If a 30-N force is required to keep it stretched to a length of 38 cm, how much work W i
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Can you please explain how to do this so I can understand what to do for the other questions
tatyana61 [14]

Answer:

The circle length is 90*pi which should be 3.14

So the circle length is 282.6

The central angle is 90 degree which is 1/4 part of 360 degree

From the theory of arc, the arc length should also be 1/4 part of circle length.

So the answer should be 1/4 * 282.6 = 70.65

Becasue it should be to the nearest tenth, so the answer should be 70.7

Step-by-step explanation:

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3 years ago
0.5 of what number is 22?​
klio [65]

Answer:

44

Step-by-step explanation:

if you multiply 44 by 0.5(same as dividing it by 2), then you will get 22.

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Describe a sequence of transformations that exhibits the similarity between the pair of figures shown.
kow [346]

Answer:

Reflection across the x-axis followed by dilation by a scale factor of \frac{1}{4} with the center of dilation at the origin

Step-by-step explanation:

Rectangle EFGD has vertices at points E(-6,8), F(0,8), G(0,1) and D(-6,1).

1 transformation - reflection across the x-axis with the rule

(x,y)\rightarrow (x,-y)

So, the image rectangle E''F''G''D'' has vertices with coordinates

  • E(-6,8)\rightarrow E''(-6,-8);
  • F(0,8)\rightarrow F''(0,-8);
  • G(0,1)\rightarrow G''(0,-1);
  • D(-6,1)\rightarrow D''(-6,-1).

2 transformation - dilation by a scale factor of \frac{1}{4} with the center of dilation at the origin. This transformation has the rule

(x,y)\rightarrow (\frac{1}{4}x,\frac{1}{4}y)

Thus,

  • E''(-6,-8)\rightarrow E'(-\frac{3}{2},-2);
  • F''(0,-8)\rightarrow F'(0,-2);
  • G''(0,-1)\rightarrow G'(0,-\frac{1}{4});
  • D''(-6,-1)\rightarrow D'(-\frac{3}{2},-\frac{1}{4}).

These are exactly vertices of rectangle E'F'G'D'.

7 0
3 years ago
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