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OLga [1]
3 years ago
6

If pentagon ABCDE is rotated 180° around the origin to create pentagon A′B′C′D′E′, what is the ordered pair of point D′?

Mathematics
2 answers:
Softa [21]3 years ago
4 0

Answer:

Its  A (-1,2)

Step-by-step explanation:

180 degree rule is (-x,-y)

point D is (1,-2)

Since the two is already a negative you have to turn it into a positive so that's why it would be (-1,2).

Vesna [10]3 years ago
3 0
Can u include a picture?
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Luden [163]

Answer:

40 grams of 13% alcohol solution and 10 grams of 18% alcohol solution.

Step-by-step explanation:

13%(x) + 18%(50-x) = 14%*50g   Multiply them all

0.13x + (9-0.18x) = 7

0.13x-0.18x + 9 = 7   Simplify the equation and subtract 0.13x from 0.18x

9-0.05x = 7   Add 0.05x to each side

9 = 7+0.05x   Subtract 7 from both sides

0.05x = 2   Multiply each side by 100

5x = 200   Divide both sides by 5

x = 40

50 - 40 = 10

40 grams and 10 grams

Your welcome

4 0
3 years ago
Read 2 more answers
If x+y=z and z=x+4,then x+y=x+4
lidiya [134]
That is true because as you can see in the other 2 equations, they both have z on one of the sides meaning that the sides that don't have z are equal to each other

Hope this helps :)
3 0
3 years ago
The expression (x3)(x-15) is equivalent to xn. What is the<br> value of n?
Wittaler [7]

Answer:

-45 is xn

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5 0
3 years ago
The speed of the current in a creek is 5 mph. A person clan kayak 3 mi upstream in the same time that it takes him to kayak 13 m
Brut [27]

Answer:

8

Step-by-step explanation:

0) the basic formula is: L=v*t, where L - distance, v - speed/velocity; t - time;

1) if the person's speed in still water is 'v' and the speed of water is 5 (according to the condition), then the upstream speed is 'v-5' and the downstream speed is 'v+5';

2) according to the condition the upstream time and the downstream time are the same, it means t₁=t₂=t, where t₁=upstream time and t₂=downstream time;

3) according to the items above it is possible to make up the equation of the upstream travel: t(v-5)=3; ⇒ t=3/(v-5);

4) according to the items above it is possible to make up the equation of the downstream travel: t(v+5)=13; ⇒ t=13/(v+5);

5) if t=3/(v-5) and t=13/(v+5), then

\frac{3}{v-5} =\frac{13}{v+5}; \ => \ v=8.

8 0
2 years ago
ASAP AND BRAINLIEST please please help guys im in a hurry
Vera_Pavlovna [14]

Answer:

(2, 1.5)

Step-by-step explanation:

Outlier Definition:  An outlier is defined as a data point that emanates from a different model than do the rest of the data.

The only one that stands out is (2, 1.5)

Answer:  (2, 1.5)

8 0
3 years ago
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