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svp [43]
2 years ago
12

Can a rational number with rational exponent be irrational

Mathematics
1 answer:
bazaltina [42]2 years ago
4 0

Yes. In general, a rational number with a non-integer exponent is not assured of being rational. (Any prime with a non-integer exponent is irrational, for example.)

2^(1/2) is irrational

(9/25)^(3/2) is rational

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Evaluate -a - 12a 2 for a = -1
Serhud [2]
The answer is -11
You put "-1" in place of all the "a"s and get 
-(-1) - 12(-1)^2
-(-1) is just 1, and (-1)^2 is "1"
We are then left with 1-12(1) which is 1-12 which is -11
6 0
2 years ago
Which functions have an axis of symmetry of x = -2? Check all that apply. A. f(x) = x^2 + 4x + 3 B. f(x) = x^2 - 4x - 5 C. f(x)
Snowcat [4.5K]

Answer:

A. f(x) = x^2 + 4x + 3

D. f(x) = -2x^2 - 8x + 1

Step-by-step explanation:

The axis of symmetry is found by h = -b/2a  where ax^2 +bx +c

A. f(x) = x^2 + 4x + 3

  h = -4/2*1 = -2    x=-2

B. f(x) = x^2 - 4x - 5

h = - -4/2*1 = 4/2 =2  x=2  not -2

C. f(x) = x^2 + 6x + 2

h =  -6/2*1 = -3/2 =  x=-3/2  not -2

D. f(x) = -2x^2 - 8x + 1

h = - -8/2*-2 = 8/-4 =-2  x=-2  

E. f(x) = -2x^2 + 8x - 2

h = - 8/2*-2 = -8/-4 =2  x=2  not -2

7 0
2 years ago
How to convert 11/27 into a decimal
il63 [147K]

Answer:

11 ÷ 27 = 0.407407

Step-by-step explanation:

Una fracción, como 11/27, tiene un numerador y un denominador separado por una línea divisoria.

11 es el numerador, porque es el número de arriba de la línea divisoria.

27 es el denominador porque es el número de abajo de la línea divisoria.

Para convertir 11/27 a decimal, divide el numerador por el denominador.

4 0
3 years ago
The number is greater than 225 her number is less than 200 - 10 + 7 what is lucky number
horsena [70]
The answer should be = 226
7 0
3 years ago
Please help with 22 I will give brainliest
Elan Coil [88]

Answer:

5 is the greatest number of cups we can make.

Step-by-step explanation:

Given: 50 red bears, 25 blue bears and 35 green bears.

Now, finding the greatest number of cups we can make with same number of each colour in cups.

∴ we will be using greatest common factor (GCF) to know the number of cups.

50= 5\times 5\times 2\\\\25= 5\times 5\\\\35= 5\times 7

∴ GCF= 5

5 is the greatest number of cups we can make with same number of each colour.

7 0
3 years ago
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