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3 years ago

14

Help it’s for my final most of my grade

1 answer:

Hitman42 [59]3 years ago

6 0

Answer is C !!!!!!!!!

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Similar Triangles Question w/ Picture

melomori [17]

Answer:

$EF=\dfrac{120}{7}\ ft$

Step-by-step explanation:

Triangles CEF and CAD are similar right triangles (they have the common angle, so by AA postulate they are similar). Similar triangles have proportional corresponding sides, so

$\dfrac{EF}{AD}=\dfrac{CF}{CD}\\ \\\dfrac{EF}{40}=\dfrac{CF}{CD}$

Triangles DEF and DBC are similar right triangles (they have the common angle, so by AA postulate they are similar). Similar triangles have proportional corresponding sides, so

$\dfrac{EF}{BC}=\dfrac{DF}{DC}\\ \\\dfrac{EF}{30}=\dfrac{CD-CF}{CD}\\ \\\dfrac{EF}{30}=1-\dfrac{CF}{CD}$

Substitute the fraction $\frac{CF}{CD}$ from the first equality into the second equality:

$\dfrac{EF}{30}=1-\dfrac{EF}{40}\ [\text{Muliply by 120}]\\ \\4EF=120-3EF\\ \\4EF+3EF=120\\ \\7EF=120\\ \\EF=\dfrac{120}{7}=17\dfrac{1}{7}\ ft$

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3 years ago

HELP QUICK IM STRUGGLING!:(

lukranit [14]

The answer is B hopefully this helped

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3 years ago

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PLEASE HELP ME, I WOULD APPRECIATE IT. What is the perimeter of the figure below?

nekit [7.7K]

Answer:

33

Step-by-step explanation:

Perimeter = sum of all sides

; 2 + 9 + 11 + 2 + (11 - 2)

; 33

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4 years ago

Please give me the answer

Anna11 [10]

Answer:

52

Step-by-step explanation:

sorry if it's wrong

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3 years ago

What is 0.25 ÷ 5.46 (show ur work)

kenny6666 [7]

Answer:

0.04578

Step-by-step explanation:

Hope this helps somewhat.

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2 years ago

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