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cluponka [151]
2 years ago
8

Find E, the midpoint of RD, if R(4, –5) and D(2, 3).

Mathematics
1 answer:
dedylja [7]2 years ago
8 0

Answer:

E (3;-1)

Step-by-step explanation:

the 'x' coordinate of E: (4+2)/2=3;

the 'y' coordinate of E: (-5+3)/2= -1.

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To factor the quadratic expression x^2−8x−10 by completing the square, what value would be added? A. 64 B. 8 C. 16 D.-16
Elan Coil [88]

Answer:

C

Step-by-step explanation:

When completing the square, we essentially want to create a perfect square trinomial by adding a constant.

If we have the following expression:

x^2+bx

And we want to complete the square, we will need to divide the b-coefficient by half and then square it.

Thus, the added term should be:

(b/2)^2

In the given equation, we have:

(x^2-8x)-10

The b term here is 8. Therefore:

(8/2)^2\\=(4)^2\\=16

The value we would add would be 16.

The answer is C.

Further notes:

To complete the square, add 16 like mentioned earlier. However, we also need to subtract 16 to balance things out:

(x^2-8x)-10\\=(x^2-8x+16)-10-16\\

The expression inside the parentheses is now a perfect square trinomial. Factor it:

=((x)^2-2(4)(x)+(4)^2)-26\\=(x-4)^2-26

And we are done!

4 0
3 years ago
Read 2 more answers
Help plz !!!!!!!!!!!!!!!!!!!!!!!
hoa [83]
That ones a hardddd one ill let someone else answer thatttttt
7 0
3 years ago
Need help asap! Please and thank you
FromTheMoon [43]

Answer:

1,2,5 No 3,4 Yes

Step-by-step explanation:

x(x^2-5) No

x(x^2-25x) No

x(x^2-25) Yes

x(x+5)(x-5) Yes

x(x-5)^2 No

3 0
2 years ago
Read 2 more answers
Aneesha travels at a rate of 50 miles per hour. Morris is traveling 3 feet per second less than Aneesha. Which is the best estim
astra-53 [7]
It would be nice to know some options, but here's Morris's speed.
Since Morris is traveling at three feet per second, we want to change it to per hour.
3 * 3600 = 10800 feet per hour
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10800/5280 is about 2, more specifically 2.05 ish.
So Morris is traveling 2 mph less then 50, or about 48 mph.
3 0
3 years ago
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Emma uses a 250 meters roll of crepe paper to make steamers how many dekameters of crepe paper does Emma use
Ksivusya [100]
The  dekameter (or decameter) first needs to be a translated into how many the meters. deka means 10, so a dekameter it must be 10 meters. So we have to divide 250 by 10, and then we will come up with 25 dekameters.
hope that helps!!
6 0
3 years ago
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