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Alenkinab [10]
3 years ago
6

Can you help me ? 70 points

Mathematics
2 answers:
blsea [12.9K]3 years ago
7 0

Answer:

x=5

Step-by-step explanation:

CE = EB since E is the midpoint of CB (proven by AD intersecting it).

If CE=EB, then:

2x=15-x\\

<em>Add </em>x<em> to both sides</em>

3x=15\\

<em>Divide both sides by 3</em>

x=5

LUCKY_DIMON [66]3 years ago
3 0

Answer:

5

Step-by-step explanation:

Since the diagonals of a parallelogram bisect each other, the two halves must be equal. Therefore:

15-x=2x \\\\15=3x \\\\x=5

Hope this helps!

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Para la ecuación 2x+5y-3=0, halla la coordenada que falta (-3,?)
butalik [34]

Answer:

(-3, \frac{9}{5})

Step-by-step explanation:

We have the equation 2x + 5y-3 = 0.

The ordered pairs of this equation have the form (x_0, y_0)

Where x is the independent variable and y is the dependent variabe.

That is, the points belonging to the line 2x + 5y-3 = 0 have the form (x_0, f (x_0))

For y = f(x).

So, we need to find f(x_0) for x_0 = -3.

Then we substitute x = -3 into the equation and clear the value of y.

2(-3) + 5y -3 = 0

-6 + 5y = 3\\\\5y = 9\\\\y = \frac{9}{5}.

Then the ordered pair is:

(-3, \frac{9}{5})

6 0
3 years ago
Please help, I’ll mark you as brainliest!!!!
Rainbow [258]

Answer:

80%

Step-by-step explanation:

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Romashka-Z-Leto [24]

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The quadrilaterals JKLM and PQRS are similar.
Sveta_85 [38]

Answer:

x = 2.8

Step-by-step explanation:

If the quadrilaterals are similar, then the ratios of corresponding sides will be equal:

KL : QR = 4 : 5.6 = 4 / 5.6 = 5/7

JM : PS = 7 : 9.8 = 7 / 9.8 = 5/7

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This shows that the ratio of KJ : QP = 5/7

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Therefore, \frac{2}{x}=\frac{5}{7}

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8 0
2 years ago
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