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3 years ago

11

Help me plz thank you

1 answer:

Travka [436]3 years ago

3 0

Answer: 2nd one

Hard to explain

Pls give brainliest.

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Help plz and thanks

rodikova [14]

Answer:

6b

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

In a test contains 10 questions, +3 marks are given for every correct answer and -1 mark are given for every incorrect answer. S

romanna [79]

I think it would be 21 points total for 7 correct awnsers I did the math hope it helps

5 0

3 years ago

Read 2 more answers

Can someone help me with these 3

photoshop1234 [79]

24. 244 cm

25. 65 mm

26. 37/80 or 0.4625

8 0

4 years ago

A racquetball club charges $10 for a one-month trial membership. After the trail month, the regular membership fee is $12 per mo

Furkat [3]

Membership is discounted $2 for first month
c=cost of one month
d=discount=$2
x=# of months
xc - 2= total cost
x for 1 month is 1, c is always 12, -2 is constant
1 x(12) - 2=10 for first month
8 months
8c -2=total cost for 8 months
8 x 12 - 2= 94 for 8 months

5 0

3 years ago

A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

6 0

3 years ago