P(8 or 12) = 1/6
P(not 8 or 12 = 5/6
Let the expected points fro one roll be X.
$E(X)=9\times\frac{1}{6}-2\times\frac{5}{6}=-\frac{1}{6}\ points$
The answer is -(1/6) points.

5 0

3 years ago

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De las soluciones de la siguiente ecuación: x2 + 8x − 30 = 18? Cual es el numero de mayor valor Entre.

vekshin1

Answer:

The correct answer is "x = 4" and "x = -12".

Step-by-step explanation:

The given equation is:

⇒ $x^2+8x-30=18$

On subtracting "18" from both sides, we get

⇒ $x^2+8x-30-18=18-18$

⇒ $x^2+8x-48=0$

On applying factorization, we get

⇒ $x^2+12x-4x-48=0$

On taking common, we get

⇒ $x(x+12)-4(x+12)=0$

⇒ $(x-4)(x+12)=0$

⇒ $x-4=0$

$x=4$

or,

⇒ $x+12=0$

$x=-12$

4 0

3 years ago

Valerie earns $24 per hour. Which expression can be used to show how much money she earns in 7 hours?

GuDViN [60]

B. because you are still multipying they just broke it down (7*24)= 168 , and b also = 168

8 0

3 years ago

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What is 2/3 ÷ 4/5 = ?

11Alexandr11 [23.1K]

Answer:

5/6

Step-by-step explanation:

2/3 ÷ 4/5 = ⇒ changing division to multiplication by reciprocal of the second fraction
2/3 × 5/4 = ⇒ simplify and multiply numerators and denominators
5/6 ⇒ here is the answer

3 0

3 years ago