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Hunter-Best [27]
3 years ago
11

If d is the midpoint of ce, ce=10x+18 and de=7x-1, find x

Mathematics
2 answers:
sashaice [31]3 years ago
7 0
Given that D is the mid point of CE ,


So D will bisect CE, it means the length of DE and CD is equal.


=> DE + CD = CE



As DE and CD are equal,



=> DE + DE = CE

=> 2 DE = CE



Putting values from the question,


=> 2( 7x - 1 ) = 10x + 18

=> 14x - 2 = 10x + 18

=> 14x - 10x = 18 + 2

=> 4x = 20

=> x = 20 / 4

=> x = 10 / 2

=> x = 5

.





Therefore, the value of x is 5
sveta [45]3 years ago
6 0

X = 5 which gives you your answer. Sorry for no work I'm not sure how to do it.

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PLZ HELP WITH THIS QUESTION!
Bad White [126]

Answer:

D

Step-by-step explanation:

Given the quadratic

d = - 16t² + 12t ← subtract d from both sides

- 16t² + 12t - d = 0 ← in standard form

with a = - 16, b = 12, c = - d

Use the quadratic formula to solve for t

t = ( - 12 ± \sqrt{12^2-(4(-16)(-d))}) / - 32

 = ( - 12 ± \sqrt{144-64d}) / - 32

 = ( - 12 ± \sqrt{16(9-4d)}) / - 32

 = ( - 12 ± 4\sqrt{9-4d}) / - 32

 = \frac{-12}{-32} ± \frac{4}{-32}\sqrt{9-4d}

 = \frac{3}{8} ± \frac{1}{8}\sqrt{9-4d}

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8 0
3 years ago
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Lesechka [4]
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8 0
3 years ago
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Task 5:
Natasha_Volkova [10]

Answer:

p=18x+4

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Step-by-step explanation:

Given:

l=5x-7

w=4x+9

Required:

Area of the rectangle=?

Perimeter of the rectangle=?

If x = 9 inches what is the area of the shape=?

Formula:

a=l*w

p=2(l+w)

Solution:

p=2(l+w)

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a=20x^2+17x-63

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a=20x^2+17x-63

a=20(81)+17(9)-63

a=1620+153-63

a=1413-63

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fiasKO [112]
10% of $2,000 is $200.

30%=3*10%

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