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kolezko [41]
3 years ago
9

A and B represent whole numbers, and A▯B means A² + B² - 2AB. What is the value of 9▯(5▯2)?

Mathematics
1 answer:
andreev551 [17]3 years ago
3 0
It’s 54 because I did the math to get the answer
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4.
avanturin [10]

Answer:

A.) x / 3 = 12      ----> x = 12(3)   ----><em> </em><em>x = 36</em>

B.) 2x + 3 = 20  ----> 2x = 17 ----> x = 17/2

C.) 4/3x = 10/3 ----> x = 10/3 x 3/4 ----> x = 30/12 = 5/2

D.) -4x = -24 ----> x = -24/-4 ----> x = 6

E.) 2(x-4) = 10 ----> 2x - 8 = 10 ----> 2x = 18 ----> x = 9

F.) -0.5x + 1.1 = -2.9 ----> -0.5x = -4 ---> x = -4 / -0.5 ----> x = 8

4 0
3 years ago
Need help ASAP will give you brainliest!!!!
garri49 [273]

Answer:I think it’s C

Step-by-step explanation:

8 0
3 years ago
James used substitution to solve this system of equations which equation could be the result of his first step?
vaieri [72.5K]

Answer: OPTION D.

Step-by-step explanation:

<h3> The compete exercise is: "James used substitution to solve this system of equations. Which could be the result of his first step</h3><h3> \left \{ {{2x+3y=12} \atop {y=x+1.5}} \right.\\\\\\A.y=2x+3y\\B.y=2x+3y+1.5\\C.2x+3x+1.5=12\\D.2x+3(x+1.5)=12 "</h3>

Given the sytsem of equations:

\left \{ {{2x+3y=12} \atop {y=x+1.5}} \right.

1-  Solve for one of the variables from any equation and substitute it into the other equation.

2- Solve for the other variable in order to get its value.

3-  Substitute this value  back into one of the original equations. and find the value of the other variable.

In this case youu can observe that the second equation is already solved for "y", therefore, in  order to use the Substitution Method, the first step is: Substitute the second equation into the first one.

Therefore, the  equation that could be the result of James' first step is:

2x+3y=12\\\\2x+3(x+1.5)=12

5 0
4 years ago
Read 2 more answers
Un dispositivo de seguridad biométrico erróneamente rechaza la admisión de 1 en 1000 personas autorizadas de una instalación que
Leona [35]

Usando probabilidad condicional, se encuentra que hay una probabilidad de 0.0186 = 1.86% que la persona esta realmente autorizada para ingresar.

------------------

Probabilidad Condicional

P(B|A) = \frac{P(A \cap B)}{P(A)}

En que:

  • P(B|A) es la probabilidad de que ocurra el evento B, dado que A sucedió.  
  • P(A \cap B) es la probabilidad de que ocurran tanto A como B.  
  • P(A) es la probabilidad de que ocurra el evento A.

En este problema:

  • Evento A: Persona rechazada.
  • Evento B: Autorizada.

La probabilidad de una persona ser rechazada es:

  • \frac{1}{1000} = 0.001 de 95% = 0.95(autorizada).
  • \frac{1 000 000 - 1}{1 000 000} = 0.999999 de 5% = 0.05(non autorizadas).

O sea:

P(A) = 0.001(0.95) + 0.999999(0.05) = 0.05094995&#10;

La probabilidad de una persona estar autorizada y ser rechazada es:

P(A \cap B) = 0.001(0.95)

¿Cuál es la probabilidad que la persona esta realmente autorizada para ingresar?

P(B|A) = \frac{P(A \cap B)}{P(A)}

P(B|A) = \frac{0.001(0.95)}{0.05094995}

P(B|A) = 0.0186

Probabilidad de 0.0186 = 1.86% que la persona esta realmente autorizada para ingresar.

Un problema similar es dado en brainly.com/question/18734831

3 0
3 years ago
Jay Downs only worked 15 of his scheduled hours last week. If he worked 75% of his scheduled hours, how many hours was he schedu
lana [24]

divide 15 hours by 75%

15 / 0.75 = 20

he was scheduled for 20 hours

7 0
3 years ago
Read 2 more answers
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