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N76 [4]
3 years ago
5

An image point of a tranformation has coordinates Y'(2, -4). If the pre-image point had coordinates Y(6, -12) what was the trans

formation and scale factor?
a. reflection with scale factor 3
b. reflection with scale factor 1/3
c. dilation with scale factor 3
d. dilation with scale factor 1/3
Mathematics
1 answer:
galina1969 [7]3 years ago
6 0
Dilation with a scale factor 1/3. the original points are three times as big as the transformed points, so the transformation needed to reduce the size by three times smaller.
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Answer:

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In Lucille’s class, 35% of the students have blond hair. There are 20 students in the class. How many students have blond hair.
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Answer:

7 the answer is 7

Step-by-step explanation:

1. We assume, that the number 20 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 20 is 100%, so we can write it down as 20=100%.

4. We know, that x is 35% of the output value, so we can write it down as x=35%.

5. Now we have two simple equations:

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where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

20/x=100%/35%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 35% of 20

20/x=100/35

(20/x)*x=(100/35)*x       -

20=2.85714285714*x       -

20/2.85714285714=x

7=x

x=7

now we have:

35% of 20=7

we multiply both sides by x

then we divide both sides by 2.85714285714 to get x

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Cross multiply:
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To find the number of snowboarders, add 1250.
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Answer:

Answer:

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Step-by-step explanation:

Step-by-step explanation:

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