4 years ago

How can we determine if two events are independent?

1 answer:

4 0

Two events are independent if the outcome of the second event is not affected by knowing the outcome of the first outcome.Example: If you have a bag of marbles of 3 red, 4 yellow, and 2 green, and you grab a yellow marble out of the bag then replace it what is the probability of grabbing another yellow one. Since you replaced it the probability of the second is not affected by the first one.

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The sum of two numbers is 23. The first number is 3/20 of the second number. What are the numbers?

Thepotemich [5.8K]

Answer:

Here's what i know:

x + y = 23

3y / 20 =x

Here we can use substitution to help find our answer:

y + 3y/20 = 23

20y/20 + 3y/20 = 23

23y/20 = 23

23y = 23 * 20

y = 23 * 20 / 23

y = 20

x + 20 = 23

x = 3

6 0

3 years ago

Read 2 more answers

PLEASE PLEADE HELP!!

andreev551 [17]

By looking at the diagram, we see that angle C is 45 degrees, angle A is 90 degrees, and angle B is unknown

Given that the sum of all the triangle's angle is 180 degrees, angle B is also 45 degrees

This means that we have a 45-45-90 triangle, which has some special properties as shown in the diagram I uploaded.

Thus <u>BC in the simplest term is </u> $14\sqrt{2}$

Hope that helps!

Download pdf

8 0

3 years ago

i would like to keep track of how much candy i eat each day remember the y axis is vertical and axis is horizontal

frozen [14]

Answer:then the days would be on the x axis (dependant variable) and the Amount of candy would be on the y axis(independent variable=something that can be changed)

7 0

4 years ago

If 7a=3 and 3b=7 what is the value of a/b

Luba_88 [7]

A=3/7 b=4....................

8 0

3 years ago

A pair of dice was rolled many times

il63 [147K]

Answer:

$5:12$ or $\frac{5}{12}$