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Pani-rosa [81]
3 years ago
8

When graphing an inequality on a number line, an open circle means which of the following?

Mathematics
2 answers:
Troyanec [42]3 years ago
6 0
Use an open circle for "less than" or "greater than", and a closed circle for "less than or equal to" or "greater than or equal to". The solution set for this problem will be all values that satisfy both -3 < x and x < 4.
Sliva [168]3 years ago
4 0

Answer:

Does NOT include the number the circle is placed on

Step-by-step explanation:

I don't see the answer choices that you have, so this is the best I could do! Hoped it helped!

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Consider rolling two fair dice one 3-sided the other 5-sided
Ne4ueva [31]

Since the dice are fair and the rolling are independent, each single outcome has probability 1/15. Every time we choose

1\leq x\leq 3,\quad 1\leq y \leq 5

We have P(X=x)=\frac{1}{3} and P(Y=y)=\frac{1}{5}, because the dice are fair.

Now we use the assumption of independence to claim that

P(X=x, Y=y) = P(X=x)\cdot P(Y=y) =\dfrac{1}{3}\cdot\dfrac{1}{5} = \dfrac{1}{15}

Now, we simply have to count in how many ways we can obtain every possible outcome for the sum. Consider the attached table: we can see that we can obtain:

  • 2 in a unique way (1+1)
  • 3 in two possible ways (1+2, 2+1)
  • 4 in three possible ways
  • 5 in three possible ways
  • 6 in three possible ways
  • 7 in two possible ways
  • 8 in a unique way

This implies that the probabilities of the outcomes of W=X+Y are the number of possible ways divided by 15: we can obtain 2 and 8 with probability 1/15, 3 and 7 with probability 2/15, and 4, 5 and 6 with probabilities 3/15=1/5

8 0
3 years ago
Write the equation of the vertical line that contains (5,-4)
swat32
The answer is y=5x-4
3 0
3 years ago
20% of what number is 90?
ehidna [41]
90 = (20)(x)
so you have to solve for x
90/.20 =450
answer is 450
8 0
3 years ago
Find the area of a rectangle with length (x- 3) and <br> width (x + 5).
Anarel [89]

Answer:

x^2+2x-15

Step-by-step explanation:

A=L*W

A=(x-3)(x+5)

A=x^2+5x-3x-15

A=x^2+2x-15

hope this helps ya!

can i get brainliest please?

7 0
3 years ago
A hang glider pilot accidentally drops her compass from the top of a 400-foot cliff. The height h of the compass after t seconds
KonstantinChe [14]

Answer:

5 seconds

Step-by-step explanation:

H= -16t2 + 400

Hit ground

H=0

0 = -16t2 + 400

0 = -16 ( t2 - 25)

-16

t2 -25 = 0

(t + 5)(t - 5) = 0

t + 5 = 0

- 5 -5

t = -5

t - 5 = 0

+ 5 +5

t = -5

t = 5

5 seconds to hit the ground

7 0
3 years ago
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