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3 years ago

A couple plans to have two children. What is the probability that they have exactly one boy?

Mathematics

2 answers:

Licemer1 [7]3 years ago

7 0

Answer:

1/2

Step-by-step explanation:

Setler79 [48]3 years ago

7 0

Male and female having two children. The chance of having a 1 boy is 50%

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16.) A. B. C. Algebra 2 chapter 7

Slav-nsk [51]

Your equation for exponential growth is of the form $y=a(b) ^{x}$ , where a is the initial or starting value and b is the multiplier. DO NOT EVER EVER MULTIPLY A TIMES B AND THEN RAISE IT TO THE X POWER! This is not the way you do these. A and B remain separate. In our situation, we have an equation that looks like this $y=8(4) ^{x}$ . That's part a. Now we need to find how many bacteria are on it 5 hours later, which will be subbed in for our x in the equation. $y=8(4) ^{5}$ . Raise 4 to the 5th power first to get 1024, then multiply that by 8 to get a total of 8192 bacteria on your cookie 5 hours later. That's part b. Now for part c, you're going to have to use some of the properties of logs to solve this. This time they're asking for the time it takes to get 100,000 bacteria on the cookie, which is your x value. You need to get it out from being an exponent to being a "regular" variable we can solve for. So our equation now uses the number of bacteria as our y: $100,000=8(4) ^{x}$ . Begin by dividing both sides by 8 to get rid of it on the right: $12,500=4 ^{x}$ . Now take the log of both sides to bring down that x: $log(12,500)=log(4) ^{x}$ , and using the power property we have log(12,500) = x log(4). Now we will divide both sides by log(4) to isolate the x and do the work on our calculator to find that x= 6.80. In other words, it will take just short of 7 hours for your cookie to have 100,000 bacteria on it. I'd suggest cafeteria food, but that might kill you quicker!

5 0

3 years ago

It takes 8 workers 12 days to build a wall work out how many days it would take 3 workers to complete the same job

MissTica

Answer: 4.5 days or 4 1/2 days

Step-by-step explanation: We can use cross product property, to solve this. Workers to Days remember that

6 0

3 years ago

What is the solution to the system of equations? 3x-6y=-12 " " x-2y=10 Use the substitution method to justify that the given sys

Thepotemich [5.8K]

The two lines in this system of equations are parallel

Step-by-step explanation:

Let us revise the relation between 2 lines

If the system of linear equations has one solution, then the two line are intersected
If the system of linear equations has no solution, then the two line are parallel
If the system of linear equations has many solutions, then the two line are coincide (over each other)

∵ The system of equation is

3x - 6y = -12 ⇒ (1)

x - 2y = 10 ⇒ (2)

To solve the system using the substitution method, find x in terms of y in equation (2)

∵ x - 2y = 10

- Add 2y to both sides

∴ x = 2y + 10 ⇒ (3)

Substitute x in equation (1) by equation (3)

∵ 3(2y + 10) - 6y = -12

- Simplify the left hand side

∴ 6y + 30 - 6y = -12

- Add like terms in the left hand side

∴ 30 = -12

∴ The left hand side ≠ the right hand side

∴ There is no solution for the system of equations

∴ The system of equations represents two parallel lines

The two lines in this system of equations are parallel

Learn more:

You can learn more about the equations of parallel lines in brainly.com/question/8628615

#LearnwithBrainly

6 0

3 years ago

A cat weighs 3.5 ounces when born. The cat grows 0.5 ounces each week. After

ehidna [41]

Answer:

10 weeks

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

4(n-1)+2 = -23 +7n

liubo4ka [24]

Answer:

Step-by-step explanation:

4(n-1)+2 = -23 +7n

=> 4n - 4 + 2 = - 23 + 7n

=> 23 - 4 + 2 = 7n - 4n

=> 21 = 3n

$= > n = \frac{21}{3}$

=> n = 7 (Ans)

6 0

3 years ago