1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
neonofarm [45]
3 years ago
15

Mike is picking out 4 books to read out of collection of 12. How many ways can the books be picked?

Mathematics
2 answers:
Yuliya22 [10]3 years ago
7 0
You have to choose 4 books out of 12 books. You can choose any 4 books.

You can do that in 12C4 ways.

{}^{12} C_4 = \frac{12!}{4! \times (12 - 4)!} \\ \\ = \frac{12!}{4! \times 8!} \\ \\ = \frac{12 \times 11 \times 10 \times 9}{4 \times 3 \times 2 \times 1} \\ \\ = 495 \\

You can choose 4 books in 495 ways.
AURORKA [14]3 years ago
6 0
3 sets or it you could divide which would still give you 3
You might be interested in
For n = 10 and 1 = 0.59, what is P(X = 8)?
Arlecino [84]

nCx⋅px⋅(1−p)n−x

llllllllllllllllllllllllllllllllllllll

8 0
2 years ago
What is the answer and how to solve it and give me the right answer
Keith_Richards [23]

Answer:

2/10 or in its simplest form 1/5

Step-by-step explanation:

there is 2 grey marbles so 2/10 (there is 10 marbles altogether)

so half of 2 is 1 and half of 10 is 5

so the answer is 1/5

7 0
2 years ago
Read 2 more answers
Maricella solves for x in the equation 4x-2(3x-4)+4=-x+3(x+1)+1. She begins by adding –4 + 4 on the left side of the equation an
Elodia [21]

Maricella’s strategy is incorrect as the values added on the left and right side of the equation changes the original equation 4x-2(3x-4)+4=-x+3(x+1)+1  to  4x-2(3x-4)+4=-x+3(x+1)+3.

Further explanation:

Maricella begin by adding -4+4 on the left side of the equation and 1+1 on the right side of the equation 4x-2(3x-4)+4=-x+3(x+1)+1.

The value added on the left is equal to zero so it does not change the equation but the value added on the right is 2, a non-zero digit so it changes the equation as shown below.

4x-2(3x-4)+4-4+4=-x+3(x+1)+1+1+1\\4x-2(3x-4)+4+0=-x+3(x+1)+1+2\\4x-2(3x-4)+4=-x+3(x+1)+3

Therefore, the strategy used by Maricella will change the equation and so the solution of the equation will be incorrect.

One way of solving such a linear equation is by adding or subtracting the required value on each side of the equation. and then simplifying the further equation.

Similarly, the other way to solve any linear equation is by separating the variable terms on one side of the equation and constant terms on the other side of the equation.

After this simplify the linear equation to obtain the solution of the equation for x.

Whereas Maricella’s strategy fails to solve the equation 4x-2(3x-4)+4=-x+3(x+1)+1 since the values added and subtracted in the equation changes the original equation completely.

Learn more:

1. Linear equation application brainly.com/question/2479097

2. To solve one variable linear equation brainly.com/question/1682776

3. Binomial and trinomial expression brainly.com/question/1394854

Answer details

Grade: Middle school

Subject: Mathematics

Chapter: Linear equation

Keywords: equation, linear equation, Maricella, right side, left side, strategy, solve for x, adding, subtracting, variable, constant, solution of the equation, value, original equation, variable terms, constant terms.

4 0
2 years ago
Read 2 more answers
1.3n-0.03=-9 (solve for n) grade lvl. 7
bazaltina [42]

Hello from MrBillDoesMath!

Answer:

-6.9


Discussion:  

1.3n - 0.03 = -9     =>              multiply both sides by 100

130n - 3 = -900 =>

130n = -900 +3 =  -897 =>     add 3 to both sides

n = -897/130  =>

n =  - (69 * 13)/ (10*13) =>

n = - 69/10 = - 6.9




Thank you,

MrB

4 0
3 years ago
Simplify 3x + 5 + 7 x - 3 - x + 2​
stira [4]

Before we do this problem, let's go over a little algebra terminology.

The number in front of your variable is called your <em>coefficient </em>and notice that the <em>x</em> at the end of the problem does not have a coefficient.

When that happens, when there is no number in front of your variable, you can put a 1 there to fill that position. So -x can be thought of as -1x.

Next let's change all our minus signs to plus negatives.

So the problem reads 3x + 5 + 7x + -3 + -1x + 2.

Now let's simplify this by combining like terms.

We can combine our "x" terms first.

3x + 7x + -1x simplifies to +9x.

Now, 5 + -3 + 2 simplifies to 4.

So our answer is 9x + 4.

8 0
2 years ago
Read 2 more answers
Other questions:
  • Explain how 9*4 can help you find 9*8.
    10·2 answers
  • True or false A ratio shows a relationship between like values
    14·1 answer
  • -6x + 2y = 16<br> -4x + y = 9<br><br> Can someone show me how to solve the system?
    13·1 answer
  • a 6lb watermelon costs $2.40 before a 30% discount. Which equation would allow you to find the discounted price of the watermelo
    14·1 answer
  • An object is attached to a spring that is stretched and released. The equation d= -8*cos((pi/6)*t) models the distance, d, of th
    7·2 answers
  • It’s not B someone plz help
    13·2 answers
  • Find the diagonal of a television screen 30 inches wide by 35 inches tall.
    5·1 answer
  • What’s the work and answer for this? Someone please tell me
    8·1 answer
  • Somebody solve this please? ​
    7·2 answers
  • Sally needs to find the circumference of a circle with a diameter of 20 inches. She uses a calculator to find the circumference.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!