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3 years ago

I Need help asap ! Please and thank you

Mathematics

2 answers:

jeka943 years ago

7 0

Answer:

all incorrect

Step-by-step explanation:

I did it in my head so I'm sorry if wrong

mina [271]3 years ago

7 0

Answer:

The last one is incorrect

Step-by-step explanation:

-4c^2 - 2c^2 = -6c^2

9c - c = 8c

9c - c is equal to 8c so that means the polynomial is wrong since they put 10c instead of 8c.

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What is the value of x and the length of segment DE?

disa [49]

Answer:

$x = 6.6$ and $DE = 16.2$

Step-by-step explanation:

The question is incomplete as the attachment to solve segment DE is missing. However, see attached for complete question.

Given

$\frac{5}{9}= \frac{9}{(2x+3)}$

Required

Find x

Length of DE

To find x, we need to first simplify the given equation

$\frac{5}{9}= \frac{9}{(2x+3)}$

Multiply both sides by $9(2x+3)$

$\frac{5}{9} * 9(2x + 3) = \frac{9}{(2x+3)} * 9(2x + 3)$

$5(2x + 3) = 9(9)$

$10x + 15 = 81$

Subtract 15 from both sides

$10x + 15 - 15 = 81 - 15$

$10x = 66$

Divide both sides by 10

$\frac{10x}{10} = \frac{66}{10}$

$x = \frac{66}{10}$

$x = 6.6$

From the attached;

$DE = 2x + 3$

Substitute 6.6 for x

$DE = 2(6.6) + 3$

$DE = 13.2 + 3$

$DE = 16.2$

Hence $x = 6.6$ and $DE = 16.2$

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tamaranim1 [39]

9514 1404 393

Answer:

a ≈ 4.68

Step-by-step explanation:

The law of cosines tells you ...

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a = √(b² +c² -2bc·cos(A))

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