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3 years ago

5

What is the perimeter of triangle DEF

2 answers:

LuckyWell [14K]3 years ago

7 0

Remember that A squared plus B squared equals C squared.

Since sides F_D and D_E are both 3, the answer cannot be 4.2 or 2.4.

SO basically you just add 3 + 3 = (The side F_E, which you can get by putting numbers in the formula), you should get your answer.

3² + 3² = Line EF²
9 + 9 = Line EF²
18 = Line EF²
√18

You get the idea. Hope this helps!

frozen [14]3 years ago

3 0

Answer:

i took this quiz and the answer is 10.2 units good luck

Step-by-step explanation:

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3 years ago

Read 2 more answers

4x+12=−2x<br><br> i need help my stoopid math teacher is mean...

ehidna [41]

Answer:

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Step-by-step explanation:

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3 years ago

consider the equation is Y equals 1/square root of x and y=x-2. approximate solution of the system equations

emmasim [6.3K]

Answer:

$x=1$ and $x=4$

Step-by-step explanation:

We have the following system of equations:

$y=\sqrt{x}$ and $y=x-2$

To solve the problem, we need to equal the two equations:

$x-2=\sqrt{x}$ ⇒ $(x-2)^{2} =x$ ⇒ $x^{2} -4x + 4 = x$

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So you need to find two numbers that added equal to 5 and multiplied equal to 4. These two numbers are $x=-1$ and $x=-4$ .

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5 0

3 years ago

Solve the system: 10x-9y=8 21y+15x=0.5

artcher [175]

Answer:

x = 1/2 y = -1/3

Step-by-step explanation:

Split it into 2 equations:

10x-9y=8

and

21y+15x=0.5

10x - 9y = 8

Step 1: Divide both sides by 10:

x = (8+9y)/(10)

Substitute x = (8+9y)/(10) into 21y+15x=0.5 :

21y + (3(8+9))/(2) = 0.5

Solve for y

<u>y= -1/3</u>

Substitute y= -1/3 into x = (8+9y)/(10)

<u>x = 1/2</u>

<u />

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3 years ago

Someone, please help my teacher doesn't want to help me and ugh I'm frustrated. Any help would be great!

maw [93]

Answer:

my brother said it is 5 and 10... but i do not know if it is

7 0

2 years ago