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mote1985 [20]
3 years ago
11

Square efgh has been reflected across the x axis and then reflected across the y axis which of the following transformations wou

ld return the square to its original position
Mathematics
2 answers:
Morgarella [4.7K]3 years ago
7 0

Answer:

c . reflection about x and then reflection about y axis.

Step-by-step explanation:

If we rotate the square again at an angle of 180 degrees it will return the square to its original position.

for example we just do this test

Pick a corner of the square, lets say  (x,y)


first ,we relflected the square about x axis  (-x, y)


then we reflected it about  y axis,which gives us  (-x, -y)  

To return it back to the original position we do this:

180 degree rotation:  ( - (-x)  , -  (-y) ) = (x,y)

It confirms that option C is the answer.


tigry1 [53]3 years ago
6 0
An 180-degreee rotation would return the square to its original position.
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<u>Part A
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<u />To estimate this, we should first look at our fractions and see if they can be combined to form a whole number. In this case, \frac{3}{5} and \frac{2}{3} equal approximately 1. We can add this "1" to the other to full gallons to estimate that the painter needs about 3 gallons.

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<u /><u />To find the exact amount, we should first change the mixed numbers to improper fractions. We do this by multiplying the denominator by the whole number, adding the numerator, and placing that value over the denominator.

1 \frac{3}{5} \\ \\  (5*1)+3 =8 \\  \\  \frac{8}{5}  \\  \\  \\ \\  1 \frac{2}{3} \\  \\ (3*1)+2=5 \\  \\  \frac{5}{3}  &#10;

Now, we need to find the least common denominator. This is the lowest value that both denominators will divide evenly into. In this case, that number is 15.

Next, we should multiply both fractions so that the denominator is that number. Remember that we must also multiply the numerator for the fraction to remain equivalent to its original value.

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Now, we can simply add our numerators.

25+24=49

We know that he needs \frac{49}{15} gallons of paint, but this is not in the most simplified format. To simplify, we need to turn our improper fraction back to a mixed number. To do this, we need to divide our numerator by the denominator to create our whole number, and the remainder becomes our new numerator.

\frac{49}{15} \\  \\ 49 / 15 = 3(Remainder: 4) \\  \\  3\frac{4}{15}

Using that logic, we can see that the painter needs exactly 3 \frac{4}{15} gallons of paint.    
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