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MissTica
4 years ago
5

How do you know if rational or irrational?

Mathematics
1 answer:
muminat4 years ago
5 0

Answer:

Your answer is D

Step-by-step explanation:

Punching in those equations into my calculator, A, B, and C have all come up as non rational, because \sqrt{11} isn't a rational number. It can become rational as soon as you multiply it with another number.

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Heeeeelllpppp meeeeee!!!!<br> Look at the picture to answer this question!
natta225 [31]

Answer:

A. 72

Step-by-step explanation:

Determinant of a 2x2 matrix: ad - bc

In that case,

24(18) - 30(12)

432 - 360

72

And we have our answer.

7 0
4 years ago
2x + 4y =8<br> X = 3y -6
Sergio [31]

{x,y} = {-2,3}

 [1]    2x + 4y = 8

  [2]    x - 3y = -11

 4y + 2x = 8      

-3y + x = -11  

Solve equation for the variable  x  

 [2]    x = 3y - 11

Plug this in for variable  x  in equation [1]

  [1]    2•(3y-11) + 4y = 8

  [1]    10y = 30

Solve equation [1] for the variable  y  

  [1]    10y = 30  

  [1]    y = 3  

By now we know this much :

   x = 3y-11

   y = 3

Use the  y  value to solve for  x  

   x = 3(3)-11 = -2  

Solution :

{x,y} = {-2,3}

<h2 />

~Savannah

4 0
3 years ago
3. John has $500 and wants to buy a used car but does not have sufficient money.
VMariaS [17]

Answer:820

Step-by-step explanation:

Since he got $500 the first week multiply 80x4 which is 320+500 is 820$

4 0
4 years ago
If x and y vary directly, and x = 12 when<br> y = 4, what is the value of x when y = 1 ?
castortr0y [4]

Answer:

3

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is
arsen [322]

9514 1404 393

Answer:

  B.  17°

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you of the relations between angles and sides. Here, the relevant relation is ...

  Sin = Opposite/Hypotenuse

  sin(N) = PQ/PN

  sin(N) = 4/14

  N = arcsin(4/14) ≈ 16.6° . . . . use the inverse function to find the angle

  N ≈ 17°

8 0
3 years ago
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