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Anuta_ua [19.1K]

3 years ago

7

Expressed in simplified radical form what is the value of √r-√16r when r=2

1 answer:

Ket [755]3 years ago

5 0

Answer:

- 3 $\sqrt{2}$

Step-by-step explanation:

using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

simplifying $\sqrt{16r}$ when r = 2

= $\sqrt{32}$

= $\sqrt{16(2)}$

= $\sqrt{16}$ × $\sqrt{2}$ = 4 $\sqrt{2}$ , hence

$\sqrt{2}$ - 4 $\sqrt{2}$ = - 3 $\sqrt{2}$

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What is the geometric mean of 8 and 2?

Molodets [167]

9514 1404 393

Answer:

4

Step-by-step explanation:

The geometric mean of two numbers is the square root of their product.

√(8·2) = √16 = 4

The geometric mean of 8 and 2 is 4.

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The geometric mean of n numbers is the n-th root of their product.

6 0

2 years ago

The axis of symmetry for a function in the form f(x) = x2 + 4x − 5 is x = −2. What are the coordinates of the vertex of the grap

Studentka2010 [4]

Answer:

D) $(-2,-9)$

Step-by-step explanation:

<u>Vertex Form of a Vertical Parabola:</u>

$y=a(x-h)^2+k$

Vertex -> $(h,k)$

Axis of Symmetry -> $x=h$

Vertical Scale Factor -> $a$

To turn $f(x)=x^2+4x-5$ into vertex form, we need to complete the square on the right side
Therefore, if $f(x)=0$ , then $0+9=x^2+4x-5+9$ completes the square on the right side
This becomes $9=(x+2)^2$
This means that our function in vertex form is $f(x)=(x+2)^2-9$

Therefore, the vertex of the graph is $(h,k)=(-2,-9)$ .

3 0

2 years ago

Quadrilateral LMNO is a rectangle. Find MN.

Cloud [144]

(4x-1)=(5x-8)
x=7

4(7)-1= 27

5(7)-8= 27

So the answer is 27

<span>MN = 27</span>

3 0

3 years ago

Read 2 more answers

Serggg [28]

-7 + 4(n-1). Use this and plug in 10 for n, making it

-7 + 4(9)

-7+36

29

5 0

1 year ago

What does the number 3.1968e+22 mean?

sattari [20]

You add them and then it would be 30.6898033492

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3 years ago