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navik [9.2K]
4 years ago
9

In parallelogram ABCD , diagonals AC and BD intersect at point E, BE=2x^2−x , and DE=x^2+6 .

Mathematics
2 answers:
Shtirlitz [24]4 years ago
5 0
BD=BE+ED=2x²-x+x²+6=3x²-x+6
frosja888 [35]4 years ago
3 0

BE = DE

2x^2-x = x^2+6

x^2-x-6 =0

(x+2) (x-3)

x = -2 or x = 3


1 solution using x = -2:

BE = 2(-2)^2 -(-2) = 10

DE = (-2)^2+6 = 10

10 +10 =20

2nd solution using x = 3

BE =2(3)^2-3 = 15

DE = (3)^2+6 =15

15+15 = 30


 The answer could be 20 or 30. Will need to try them both

 Would probably try 30 first ( maybe x can't be a negative number?)

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eduard
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3 years ago
HELP PLZ!!! this is a very difficult question
antoniya [11.8K]

Answer:

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6 0
3 years ago
The width of the rectangle is 7 feet, and the diagonal length of the rectangle is 16 feet. which measurement is the closest to t
yanalaym [24]

Answer: b. 14ft

Step-by-step explanation:

In the rectangle, the opposite sides are equal. The diagonal divides the rectangle into two equal right angle triangles. The diagonal represents the hypotenuse of both right angle triangles. The length and width represents the opposite and adjacent sides of the right angle triangles.

To determine the length, L of the rectangle, we would apply Pythagoras theorem which is expressed as

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Therefore,

16² = L² + 7²

256 = L² + 49

L² = 256 - 49 = 207

L = √207

L = 14.38

the closest to the length of this rectangle in feet is

14ft

3 0
3 years ago
Read 2 more answers
NEED ANSWER ASAP!
sveta [45]

Answer:

the answer is c

4.5feets

30 feets

7 0
3 years ago
Explain a strategy u could use to compare 2/6 and 5/8.
Schach [20]
Try to get the fractions with same denominators. Use the LCD system to find equal factors to a common denominator. Then just simply compare it. 

*Note: Larger fraction is the greater numerator.*

Hoped this helped.

~Bob Ross® 
6 0
3 years ago
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