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3 years ago

11

Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AC = 20 and DC = 5, what is the length of BC? (Note: the fi

gure is not drawn to scale.)

1 answer:

11111nata11111 [884]3 years ago

4 0

Answer:

21.2 or 15 sqrt of 2 (PETHAGOREOM theorem)

Step-by-step explanation:

a^2+b^2=c^2

20^2+5^2=C^2

400+25=C^2

450=C^2

sqrt 450=

15 sqrt of 2 or 21.2

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Given f(x)=3x-1, solve for x when f(x)=-7.

ddd [48]

Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

<u>Algebra I</u>

Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = 3x - 1

f(x) = -7

<u>Step 2: Solve for </u><em><u>x</u></em>

Substitute: -7 = 3x - 1
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Answer:

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Read 2 more answers

Solve for a!<br> 264=π×a×(20-a)<br> Thank you!

jasenka [17]

Answer:

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Step-by-step explanation:

264 = π × a × (20 - a)

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Opening the brackets we get;

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Applying the quadratic formula we get:

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