Find x - someone help me please

Answer:

Step-by-step explanation:

Suppose that you randomly draw one card from a standard deck of 52 cards. After writing down which card was drawn, you place the card back in the deck, shuffle the deck, and draw another card. You repeat this process until you have drawn 20 cards in all. What is the probability of drawing at least 8 hearts?

For the experiment above, let X denote the number of hearts that are drawn. For this random variable, find its expected value and standard deviation.

E(X)=

?=

Answer: 16.67% for question 1

83.33% for question 2

Step-by-step explanation:

1/6 as a percent is 16.67% because the is only 1 correct number

5/6 as a percent is 83.33% because there is 5 wrong numbers

Answer:

Step-by-step explanation: 1/36

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Explanation

Those 4 semicircles can be joined to form 4/2 = 2 full circles.

Each circle has diameter 41 cm.

Let's find the circumference of one circle

C = circumference, d = diameter = 41, pi = 3.14

C = pi*d

C = 3.14*41

C = 128.74

That's the perimeter of one full circle. Double it to get

2*128.74 = 257.48 cm

Which is the total length of the wire.

Answer:

6688

Step-by-step explanation:

I think, I hope!

The correct sequence for the numbers that are given will be:

It can be seen that from the information given, a number has been attached to each diagram. This will be used in answering the questions given.

Therefore, the correct sequence for the numbers are given will be 6408, 4608, 0846, and 8064.

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Answer:

The Second Site

Step-by-step explanation:

Hello!

Answer:

631.7 miles

Step-by-step explanation:

All you need to do is to subtract 38,573.2 miles from 39,204.9 miles.

So something like this>>>

  38,573.2

_ 39,204.9

__________

        631.7

You're Welcome! Hope it helps!

Answer: y = 3x-1

Step-by-step explanation:

Answer:

12 candy pieces per package.

Step-by-step explanation:

Rate of change is the change in y over the change in x. The change in y based on the plotted points is 12, and the change in x is just 1. So, 12/1=12.

Answer:

$8/pound

Step-by-step explanation:

$40 ÷ 5 lbs = 8$ per pound

Answer:D

Step-by-step explanation:

Answer:

-144ft below sea level

Step-by-step explanation:

It is a linear equation. Written as y=14x-270. So what you do is substitute x for 9,

y=14(9)-270

y=126-270

y=-144

Answer:

I think the answer is A. The submarine was 144 feet below sea level(-144) after 9 minutes.

Step-by-step explanation:

This is how i got me answer:

z=9

14 x 9 = 126

-270 + 126 = -144

Answer:

60 and 40 or 120 and 20

Step-by-step explanation:

60 x 2=120

40 x 3=120

60 x 40=2400

120 x 1=120

20 x 6=120

120 x 20=2400

You can try a few others, but no others have an lcm of 120

Answer:

x=27

Step-by-step explanation:

2x+18-4=68

2x+18=72

2x=54

x=27

I hope this helps even the slightest!

Please mark brainliest!

Answer: it is the alphabet

Answer:

100000

Step-by-step explanation:

10^5

Answer:

7a

Step-by-step explanation:

4a + 3a

(4 + 3)a

(7) a

Answer = 7a

Answer:

4a+3a is equivalent to 7a

Step-by-step explanation:

when simplifying you combine like terms. Since 3a and 4a are like terms and their are no exponents, all you have to do is add the coefficients together.

Answer:

the answer of the problem p=32

============================================

Work Shown:

[tex]\frac{2}{7} \div \frac{3}{7}\\\\\\\frac{2}{7} \times \frac{7}{3}\\\\\\\frac{2*7}{7*3}\\\\\\\frac{2}{3}\\\\\\[/tex]

When dividing fractions, you flip the second fraction and multiply (step 2).

Note in the last step, the 7's cancel out.

Answer:

2÷3

Step-by-step explanation:

=2÷7×3÷7

= 7 of the denominator will be cancelled

=hence, 2÷3 is the answer

Answer:

M<-6 is the answer

Step-by-step explanation:

divide -2 on both sides and 12÷-2 is -6 so m<-6

Parallel lines have the same slope.

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

m = (-3-3)/(4-0)

m = -6/4 = -3/2

Substitute the values in y = mx + c,

-5 = (-3/2)(6) + c

-5 = -9 + c

c = 4

y = (-3/2)x + 4

Thus, Option D is the correct answer

Answer:

Choice C: 5

Step-by-step explanation:

55 is a composite number. 55 = 1 x 55 or 5 x 11. Factors of 55: 1, 5, 11, 55. Prime factorization: 55 = 5 x 11 it should be 5 if 11 isn't an option to

Answer:

5.25/25=0.21

Step-by-step explanation:

to find this you can do 0.21 times 25 which gets 5.25 so there is your answer

5.25/25=0.21 is the unit price per​ card.

Division is the process of splitting a number or an amount into equal parts.

Here, given that,

A store sells a package of 25 trading cards for​ $5.25.

So, price of per card = 5.25/25

                                  =0.21

(to find this you can do 0.21 times 25 which gets 5.25 )

Hence, 0.21 is the unit price per​ card.

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Answer:

-2

Step-by-step explanation:

slope is -2 because parallel lines have equal slopes.

Answer:

3/40

Step-by-step explanation:

Answer:

3/40

Step-by-step explanation:

Answer:

60 and 100

Step-by-step explanation:

Look for 2 multiples of 20 which are also factors of 300.

No need to go all Mathematician.

It's simple, no long explanation needed

Answer:

B

Step-by-step explanation:

Answer:

assuming each person gets one cookie

a 1 1/4 C

b 3/8 tsp

Step-by-step explanation:

divide recipe in half

a 2.5/2=1.25

b 3/4 ÷ 2 ; rewrite to 6/8 ÷2 = .375