Q and R are independent events. if P(Q)= 1/4 and P (R)= 1/5, find P(Q and R)

Answers

Answer 1
Answer:

Answer:

1/4 * 1/5 = 1/20


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The sum of a number divided by 5 and 2 is equal to 6 put it in an equation

Answers

Since we are talking about a "sum", we can expect an equation with at least 2 addends. To know which parts of the of the word problem are your addends, it is necessary to take out the terms that are not to be added. Looking at the word problem, "6" is the sum, so therefore it should not be included as an addend. With "6" out of the way, we can now split the word problem into the 2 addends. One being the "number divided by 5" and the other being "2". Writing this in mathematical equation form, it would be:

Let: x = the unknown number

(X/5) + 2 = 6

Additionally, solving for the value of x, since X/5 is one term, it is necessary to isolate that. We can do this by subtracting 2 from both sides of the equation such that:

(X/5) + 2 - 2 = 6 - 2
(X/5) = 4

Multiplying both sides by 5
(X/5) * 5 = 4 * 5
X = 20

Therefore your unknown number is 20

In the slope-intercept form y=mx b, what does the m and the b stand for?

Answers

In the slope-intercept form y=mx b, m stands for the slope and b stands for the y intercept.

What is the Equation of line in Slope Intercept form?

Equation of a line in slope intercept form is y = mx + b, where m is the slope of the line and b is the y intercept, which is the y coordinate of the point where it touches the Y axis.

Slope of a line is the ratio of the change in y coordinates to the change in the x coordinates of two points given.

Slope can also be defined as the tangent of the angle that the line is making with the positive X axis.

y intercept is the y coordinate of the point where the line touches with the Y axis. The x coordinate of the point will be 0.

Hence, m stands for slope and b stands for y intercept.

Learn more about Slope Intercept form here :

brainly.com/question/29146348

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m is the slope of the line and b is the y-intercept

A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacing it, and then picking another blue marble?A. 1/15
B. 8/75
C. 4/25
D. 1/9

Answers

The total number of marbles is 15. The probability of picking a blue marble is 6/15. After putting the marble back, the probability of picking another blue marble is probably 1/9. 

Answer: the probability of picking two blue marbles in a row is 1/9.

Answer:

4/25 is the answer guys!

Step-by-step explanation:

In 56 years, Kevin will be 9 times as old as he is right now.
How old is he right now?

Answers

Answer:

he's 7 years old

Answer:

Step-by-step explanation:     Kevin will actually be 6 years and 2 months old

Name the shaded angle in three different ways

Answers

Answer:

1. "angle HGJ" or "angle JGH" (∠HGJ or ∠JGH)

2. "angle G" (∠G)

3. "angle 3" (∠3)

Step-by-step explanation:

Three ways the shaded angle can be named:

1. We can use capital letters to name the shaded angle. The middle letter indicates the vertex. Thus, we would name the shaded angle as: "angle HGJ" or "angle JGH". G is the middle letter, which indicates the vertex of the angle. Most often, the symbol "∠" is usually used to represent the word "angle". In short form, the shaded angle can be named as:

"∠ HGJ" or "∠ JGH"

2. The shaded angle can also be named according to the vertex. Thus, G is the vertex. The angle can be named "angle G" or "∠G"

3. Numbers can be placed at the vertex of the angle, and named accordingly. Thus, the shaded angle of which the vertex is labelled "3" can be named as "angle 3" or "∠3"

One positive number exceeds 4 times another positive number by 3. The product of the two numbers is 351. What are the two numbers? A) 6 and 9
B) 6 and 24
C) 9 and 39
D) 25 and 29

Answers

Hello,
Answer C 9 and 39.

Let a the first and b the second
a=4b+3
a*b=351

==>b*(4b+3)=351
==>4b²+3b-351=0
Δ=9+4*4*351=5625=75²
==>b=(-3-75)/8 =-9.75 ==>a=4*(-9.75)+3=-36 (excluded) a>0
or b=(-3+75)/8=9 and a=4*9+3=39