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NARA [144]
3 years ago
9

Zheng was curious whether △ABC and △CED are similar. He wrote a proof and came to the conclusion that they are not similar, but

his proof is wrong. What is the first mistake Zheng made in the proof? Choose 1 answer:

Mathematics
1 answer:
Aleks [24]3 years ago
7 0

Answer: C

Step-by-step explanation:

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Please help me <br> Show your work <br> 10 points
Svet_ta [14]
<h2>Answer</h2>

After the dilation \frac{5}{3} around the center of dilation (2, -2), our triangle will have coordinates:

R'=(2,3)

S'=(2,-2)

T'=(-3,-2)

<h2>Explanation</h2>

First, we are going to translate the center of dilation to the origin. Since the center of dilation is (2, -2) we need to move two units to the left (-2) and two units up (2) to get to the origin. Therefore, our first partial rule will be:

(x,y)→(x-2, y+2)

Next, we are going to perform our dilation, so we are going to multiply our resulting point by the dilation factor \frac{5}{3}. Therefore our second partial rule will be:

(x,y)→\frac{5}{3} (x-2,y+2)

(x,y)→(\frac{5}{3} x-\frac{10}{3} ,\frac{5}{3} y+\frac{10}{3} )

Now, the only thing left to create our actual rule is going back from the origin to the original center of dilation, so we need to move two units to the right (2) and two units down (-2)

(x,y)→(\frac{5}{3} x-\frac{10}{3}+2,\frac{5}{3} y+\frac{10}{3}-2)

(x,y)→(\frac{5}{3} x-\frac{4}{3} ,\frac{5}{3}y+ \frac{4}{3})

Now that we have our rule, we just need to apply it to each point of our triangle to perform the required dilation:

R=(2,1)

R'=(\frac{5}{3} x-\frac{4}{3} ,\frac{5}{3}y+ \frac{4}{3})

R'=(\frac{5}{3} (2)-\frac{4}{3} ,\frac{5}{3}(1)+ \frac{4}{3})

R'=(\frac{10}{3} -\frac{4}{3} ,\frac{5}{3}+ \frac{4}{3})

R'=(2,3)

S=(2,-2)

S'=(\frac{5}{3} (2)-\frac{4}{3} ,\frac{5}{3}(-2)+ \frac{4}{3})

S'=(\frac{10}{3} -\frac{4}{3} ,-\frac{10}{3}+ \frac{4}{3})

S'=(2,-2)

T=(-1,-2)

T'=(\frac{5}{3} (-1)-\frac{4}{3} ,\frac{5}{3}(-2)+ \frac{4}{3})

T'=(-\frac{5}{3} -\frac{4}{3} ,-\frac{10}{3}+ \frac{4}{3})

T'=(-3,-2)

Now we can finally draw our triangle:

8 0
3 years ago
Spirit Airlines kept track of the number of empty seats on flight 308 (DEN—DTW) for 10 consecutive trips on each weekday.
Murrr4er [49]

Answer:

please find below

Step-by-step explanation:

6 0
3 years ago
Which statement about these two restaurant meals is correct? A. Neither meal contains any nutrients. B. Meal A is the more healt
NISA [10]

Answer:

D. Both meals are healthful choices

3 0
3 years ago
Can someone please help with this? I am so confused
agasfer [191]

Answer:

Basically adding in and subing the letters with the numbers given too you below

Step-by-step explanation:

2(2)+(-9-13)+14= -4

-(-2(-13)+16-(-9)2= -60

-3(-9)+(2-13)+4= 48

3 0
3 years ago
Raul makes fruit cups. He uses 48,000 milligrams of pineapple, 450 grams of apples, and 0.5 kilogram of peaches. How many grams
ryzh [129]
Raul uses 998 grams of fruits.

This can be solved by converting 48,000 milligrams to grams. We do this by dividing by 1000. We get 48g. Then, we convert 0.5kg to grams by multiplying by 1000. We get 500g
5 0
2 years ago
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