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tia_tia [17]
3 years ago
12

Find the probability of drawing a face card or a 3 from a standard deck of cards.

Mathematics
2 answers:
alexira [117]3 years ago
7 0
In a standard deck of cards, there is 52 cards.

Face cards includes: Jack, Queen, King, and 1
We are also including cards worth: 3

There are 4 of each cards.

J = 4
Q = 4
K = 4
1 = 4
3 = 4

Add all of them up.

4 + 4 + 4 + 4 + 4 = 20

There are 20 cards that have a face card or is a 3.

Now place the amount you got with the total.

20/52 is the fraction probability.

Divide 20 with 52

20/52 = 0.3846

0.3846 is the decimal probability (or rounded = 0.38)

To find the percentage probability, move the decimal point to the right two place values

0.3846 becomes 38.46%.


hope this helps!
Mrrafil [7]3 years ago
4 0

There are of course 52 cards in the standard deck. A face card is a jack, queen or king, and each comes in four suits, so 12 face cards. 

Four 3s mean 16 cards of 52 satisfy our event.

p = \dfrac{16}{52} = \dfrac{4}{13}
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arlik [135]

Given pair of lines are x² + 4xy + y² = 0

⇒ (y/x) ² + 4 y/x + 1 = 0

⇒ y/x = -4±2√3/2 = -2±√3,

∴  The lines y = (-2 + √3) x and y = (-2 - √3) x and x - y = 4 forms an equilateral triangle

Clearly the pair of lines x² + 4xy +y²  = 0  intersect at origin,

The perpendicular distance form origin to x - y = 4 is the height of the

h = 2 √ 2

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4 0
2 years ago
What facts are true for the graph of the function listed below? Please check all that apply.
lana [24]

Answer:

E, B, A,

Step-by-step explanation:

C is wrong because it isn't decreasing

D is wrong because if X=0 the 5 to the power of zero would be 1 and 2*1= 2 meaning y goes lower than 5

F is wrong because  if X=0 the 5 to the power of zero would be 1 and 2*1= 2 meaning the y intercept is 2 not 5

6 0
3 years ago
Read 2 more answers
A positive real number is 2 more than another. If the sum of the squares of the two numbers is 42, find the numbers.
Brilliant_brown [7]

Answer:

Step-by-step explanation:

From the first sentence x (the number) is 2 more than another number (y). So, x+2=y. The sum of the squares of the two numbers is 42, meaning that \\ (x+2)^{2}+y^{2}=42. First, we square root the ENTIRE equation to get rid of the square. If you do one thing to one side, you have to do it to the other. After this, we have x+2+y=\sqrt{42}. Now, we subtract 2 from the other side to isolate the variable. You can isolate either one but normally I go for x. Now we have x+y=\sqrt{42}+2. Now, we want to get y to the other side so we subtract it from the left side and the right side which gives us x=-y+\sqrt{42}+2. now we know what X is equal to. Now we plug in x for \\ (x+2)^{2}+y^{2}=42, which gives us          (-y+\sqrt42}+2+2)^{2}+y^{2}=42. Now we only have one variable which is what we want. Next, we square root the entire thing to get rid of the squares, which gives us -y+\sqrt{42}+4+y=\sqrt{42}. I got lost in my work. I must have done something wrong I cant find out. If anyone wants to pick up where I left off go ahead but there's a timer and I have one minute left. I cant finish the problem in a minute. I'm sorry and hopefully I lead you somewhere.

6 0
2 years ago
What is the slope of a line parallel to the line y=5/2x-14?
ycow [4]

Answer:

5/2

Step-by-step explanation:

When you are finding the slope of a parallel line, the other line always has the same slope as the first line but different y intercept.

3 0
3 years ago
Find the slope of a line given the following two points: (4, 3) and (5, 2). 1 -1 2 -2
galben [10]
Given two points; (x₁,y₁) and (x₂,y₂) the slope is:

m=(y₁-y₂) / (x₁-x₂)      or      m=(y₂-y₁) / (x₂-x₁)

In this case:
(4,3)
(5,2)

m=(5-4)/(2-3)=1/-1=-1

Answer: the slope is -1
7 0
3 years ago
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