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larisa86 [58]
3 years ago
9

In how many ways can you answer 15 true/false questions

Mathematics
1 answer:
Anna71 [15]3 years ago
4 0

Answer:

32768

Step-by-step explanation:

Each question has 2 options.

On a true/false test with one question, there are 2¹, or 2 possible answers

On a test with 2 questions, there are 2², or 4 possible answers.

On a test with 3 questions, there are 2³, or 8 possible answers.

So, 2¹⁵ = 32768 possible ways.

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each sentence shows the number of pages a student reads in a book and the amount of time it takes those pages to read .how many
pochemuha

Answer:21

12

Step-by-step explanation:

7 0
2 years ago
Two systems of equations are shown below: System A System B 3x + 2y = 3 −x − 14y = 1 −2x − 8y = −1 −2x − 8y = −1 Which of the fo
Sauron [17]

The two linear equations represented in system A as :

3 x + 2 y =3   -------(1)

- 2 x - 8 y = -1  ------(2)

(1) × 2 + (2) × 3 gives

⇒ 6 x + 4 y - 6 x - 24 y = 6 -3

⇒ - 20 y = 3

⇒ y = \frac{-3}{20}

Putting the value of y in equation (1), we get

3 x  - \frac{6}{20}=3\\\\ 3 x= \frac{66}{20} \\\\ x=\frac{11}{10}

Two linear equation represented in system B is:

3.   -x - 14 y =1

4.   - 2 x - 8 y = -1

-2 ×Equation (3) + Equation (4)=

2 x +28 y- 2 x - 8 y= -2 -1

⇒ 20 y = -3

⇒y =\frac{-3}{20}

Putting the value of y in equation (3),we get

-x + \frac{42}{20}=1 \\\\ x=\frac{22}{20}=\frac{11}{10}

As Two system , that is system (A) and System (B) has same solution.

By looking at all the options , i found that Option (D) is correct. The two system will have the same solution because the first equation of System B is obtained by adding the first equation of System A to 2 times the second equation of System A.

6 0
3 years ago
Read 2 more answers
What is the probability of rolling a 3 on a 6-sided 8)
adelina 88 [10]

Answer:

the chances of rolling a 3 are 1/6

the changes of not doing it is 5/6

7 0
3 years ago
I know the answer but I need an explanation of how it is the answer plss.
Mashcka [7]

Answer: I got the answer by adding and subtracting

Step-by-step explanation:

4 0
3 years ago
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Juan made a design with polygons. which polygon in juan's design is pentagon
larisa86 [58]
The pentagon is the one with 5 sides. Good Luck!

6 0
3 years ago
Read 2 more answers
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