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natta225 [31]
3 years ago
11

Please help me find answer​

Mathematics
1 answer:
AlexFokin [52]3 years ago
7 0

Answer:

Step-by-step explanation:

11pi/2pi=r, r=5.5 area= pi*r^2, pi*30.25

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Brass is made up of copper and zinc. 100 grams of brass contains 20 grams of zinc.
Nana76 [90]

Answer:

A.  12 grams Zn

B.  280 g of copper.

Step-by-step explanation:

100 grams of brass

20 grams of zinc

100 grams of brass has 20 grams of Zn.

20/100 = 0.200  Zn   <u>20% Zn  and 80% copper</u>.

A.  (60 g brass)*(0.2) = 12 grams Zn

B.  (350 g brass)*(0.80) = 280 g of copper.

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2 years ago
Lesson Posttes
joja [24]

A translation 2 units to the left followed by dilation by 1/2.

The correct option is (B).

<h3>What is congruency?</h3>

It states that that two triangles are said to be congruent if they are copies of each other and when superposed, they cover each other exactly.

The complete question is:

Which of the following composition of transformations would create an

image that is not congruent to its original image?

A rotation of 45° followed by a reflection across the x-axis

A translation 2 units to the left followed by dilation by 1/2

A reflection across the y-axis followed by a rotation of 60°

A rotation of 135º followed by a translation of 4 units to the right.

After a translation of 2 units to the left followed by dilation by 1/2 the image will not be congruent to its original image.

All other options are reflection and rotation, which not fit into the situation.

Learn more about congruency here:

brainly.com/question/7888063

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2 years ago
Consider the survey descriptions shown. Survey 1: A township employee surveys all 118 workers at a shopping mall to learn about
sweet [91]

Answer:

3,2,1

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Please help me w this!!
Digiron [165]

Answer:

(-15, 14)

Step-by-step explanation:

Let the coordinates of Z be (x,y).

\frac{x+5}{2}=-5 \implies x=-15 \\ \\ \frac{y+6}{2}=10 \implies y=14

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6 is your answer :)

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