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3 years ago

How to do you add probability

1 answer:

6 0

To add the probabilities, you would have to treat them like any other numbers. If they are decimals or percents, you can follow basic addition rules. If you are given the probabilities as fractions, make sure that you have common denominators when you add them.

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What is the value of y in the solution to the following system of equations?

lukranit [14]

Answer:

Option D is the correct answer.

Step-by-step explanation:

The equations are:

5x - 3y = -11 Eqn 1

2x - 6y = -14 Eqn 2

We have to find the value of y so we will eliminate x.

Multiplying Eqn 1 by 2

2(5x-3y=-11)

10x-6y=-22 Eqn 3

Multiplying Eqn 2 by 5

5(2x-6y=-14)

10x-30y=-70 Eqn 4

Subtracting Eqn 4 from Eqn 3

(10x-6y)-(10x-30y)= -22-(-70)

10x-6y-10x+30y = -22 + 70

24y = 48

$\frac{24y}{24}=\frac{48}{24}\\y=2$

Therefore,

Option D is the correct answer.

4 0

3 years ago

-1/2 (-2x + 4y)=____________________________

Len [333]

Answer:

-1/2 (-2x + 4y)= x - 2y

Step-by-step explanation:

-1/2 (-2x + 4y)

x - 2y

7 0

3 years ago

Read 2 more answers

Pens come in packages of 6. Pencils come in

serious [3.7K]

A. The Least common multiple between 6 and 8 is 24, so you have to buy 4 packages of pens and 3 packages of pencils.

2. Since you bought 24 pens and 24 pencils, you have 48 pens and pencils in all

8 0

3 years ago

Read 2 more answers

Use the drawing tool(s) to form the correct answer on the provided number line.

Contact [7]

Answer:

See the image.

Step-by-step explanation:

3 0

2 years ago

I need help on all of these

lord [1]

well #7 is a solution.

y= 9x (4,36)

9 times 4 = 36

36/9=4

so the ordered pair is a solution.

y=3x-5 (7,16)

3 times 7 -5= 16

so once again the ordered pair is a solution.

Hoped this helped.

5 0

3 years ago