The steps below show the incomplete solution to find the value of x for the equation 7x – 3x – 4 = –1 + 21:Step 1: 7x – 3x – 4 = –1 + 21

Step 2: 7x – 3x – 4 = 20

Step 3: 4x – 4 = 20Which of these is most likely the next step? (4 points)

4x = 24
4x = 16
4x = 5
4x = 80

Answers

Answer 1

Answer: Step 1 : 7x - 3x - 4 = -1 +21
Step 2 : 7x - 3x - 4 = 20
Step 3 : 4x - 4 = 20
Step 4 4x -4 +4 = 20 + 4
4x = 24

Answer 4x = 24

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I am in a game show.In this game show there are 3 doors. Behind one of these doors lies a brand new and spectacular Ferrari, however, behind two of these doors lie nothing.

These doors are represented by the letters A, B and C respectively.

The host of this game show gives me the opportunity to win a Ferrari, and tells me that if I open the door which has this Ferrari sitting behind it, I will get to keep it. The problem is, I will only get to open one door. If it turns out to have nothing behind it, I will go home empty handed.

So, the game show host asks me which door I'd like to open. I select the door B.

Before the host opens the door B for me, he opens up the door C and shows me that nothing lies behind it.

This means that the Ferrari is either behind door A or door B.

Now, the host asks me if I'd like to open door A instead of door B. He gives me the chance to open door A. Should I open door A or should I open door B?

Would my chances of winning a Ferrari increase if I were to open door A instead of door B?

Explain your answer and justify why you are correct...

Answers

This is the well known Monty Hall problem.

You have more chances of winning by switching doors.

Let A,B,C denote the events "The ferrari is behind A" and so on
Let HA,HB,HC denote the events "The host opens A" and so on

By Baye's formula, $P(B)_(HC)=(P(HC)_BP(B))/(P(HC))=\frac{\frac{1}2\cdot\frac{1}3}{\frac{1}2}=\frac{1}3$ whereas $P(A)_(HC)=(P(HC)_AP(A))/(P(HC))=\frac{1\cdot\frac{1}3}{\frac{1}2}=\boxed{\frac{2}3}$ !!

if you switch after the host shows you the door without the ferrari, your chance of getting the car is greater.

we have 3 hypothetical situations.

if the car is in door A, but and then you pick door A, the host will open either door B or C and you will pick the other remaining door, resulting in a loss.

if the car is in door B, and you pick door A, the host will show you door C, and if you switch to door B, you will win.

if the car is in door C, and you pick door A, the host will show you door B, and if you switch to door C, you will win.

There is a 2/3 chance of winning a ferrari if you switch after the host shows you the door without.

:D

How would you solve/approach this:
sin−1(sin(7π/3))

Answers

Hello,

7π/3≡π/3 (mod 2π)

arcsin(sin(x))=x ((f^-1 o f)=1)

"Among 40 students, 20 liters of juice was served. How much juice did each student get?"

Answers

Answer:

How much juice did each student get?"

40/20=2

each student received 2L of juice

Step-by-step explanation:

Each student got 1/2 a litre or 500 ml sa 20 divided by 40 equals half

Perform the indicated operation.

4/11 · 10/8

4/11
5/11
6/11

Answers

4/11 * 10/8

Multiplying fractions
1) multiply the numerators: 4 * 10 = 40
2) multiply the denominators: 11 * 8 = 88
3) simplify the fraction
40/88 ⇒ 10/22 ⇒ 5/11

40 ÷ 4 = 10
88 ÷ 4 = 22

10 ÷ 2 = 5
22 ÷ 2 = 11

4/11 * 10/8 = 5/11

Factor out the GCF 7x+49

Answers

the capital of Wyoming is Cheyenne

Answer:

GCF=7

Step-by-step explanation:

It is 7 because you cannot have a variable since 49 does not have a variable. So you can only find a constant gcf. Which if you do this, 7 and 49 can be divided by 7, so this means its 7

What is the solution of the system? Use a graph.
y = –3x + 2
y = –3x + 4