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8090 [49]
3 years ago
11

-3√8 is a rational number or not

Mathematics
2 answers:
Free_Kalibri [48]3 years ago
7 0

9514 1404 393

Answer:

  not

Step-by-step explanation:

The square root of 8 is not the root of a perfect square, so it is irrational. Multiplying it by a rational number gives an irrational product.

  -3√8 is irrational

Advocard [28]3 years ago
7 0
Not a rational number.
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2.
levacccp [35]

Answer:

10

Step-by-step explanation:

Use the distance formula.

d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

We have x1 = 2; y1 = 0; x2 = -6; y2 = 6.

d = \sqrt{(-6 - 2)^2 + (6 - 0)^2}

d = \sqrt{(-8)^2 + 6^2}

d = \sqrt{64 + 36}

d = \sqrt{100}

d = 10

Answer: 10

8 0
3 years ago
Help idk I don’t understand please ASAP
Pachacha [2.7K]

Answer:

x = 200/3

Step-by-step explanation:

Apply Thales theorem, we have:

80/(2x) = 60/27

Let's simplify both sides:

40/x = 20/9

or

x/40 = 9/20

Multiplying both sides by 40, we have:

(40/40)x = (20/9)*40

Let's simplify one more time:

x = (20*40)/(9)

or

x = 200/3

Hope this helps!

8 0
3 years ago
Read 2 more answers
5. (9r 3 + 5r 2 + 11r) + (-2r 3 + 9r - 8r 2)
ad-work [718]

Answer:

7r³ - 3r² + 20r

Step-by-step explanation:

(9r³ + 5r² + 11r) + (-2r³ + 9r - 8r²)

You can get rid of the parentheses since there is nothing to distribute.

9r³ + 5r² + 11r - 2r³ + 9r - 8r²

Combine like factors.

7r³ - 3r² + 20r

3 0
2 years ago
If 2x + 8 = 16 , what is the value of x + 4 ?
KonstantinChe [14]

Answer:

the answer is 879

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
(1). -4 – x=3x +6
Olin [163]

Answer: <em>Hey, It's me, Lily!!</em>

Step-by-step explanation:

1) x = −5/2

2) x = 4

3) x = 5

4) x = 6

5) x = 7

                                  <u>Hope This Helps!! (^ '--')</u>

6 0
2 years ago
Read 2 more answers
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