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pantera1 [17]
3 years ago
11

Jan lost 22 points on her exam. She got 11 questions wrong.

Mathematics
2 answers:
rosijanka [135]3 years ago
7 0

Answer:

2

Step-by-step explanation:

22/11=2

jeyben [28]3 years ago
3 0
Total points =50
Total points =100 because every exam has a total of 100 points.

Total points per each question = 100 / 50 =2

She was penalized two points for each wrong question
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If M is the set of all square numbers less than 80 and N is the set of all non-negative even numbers that are under 30, Write th
Nat2105 [25]

Answer:

Step-by-step explanation:

All square numbers are numbers formed by squaring a single number. If M is the set of all square numbers less than 80, then

M = (4, 9, 16, 25, 49, 64)

Even numbers are numbers that are divisible by 2 without remainder.

If N is the set of all non-negative even numbers that are under 30, then

N = (2, 4, 6, 8 ,10, 12, 14, 16,18,20, 22, 24, 26,28)

It will not include 30 because we want even numbers under 30

8 0
3 years ago
What is the solution for x in the equation?
erastovalidia [21]
The solution for x is D=-4

7 0
2 years ago
A nursery owner buys 8 panes of glass to fix some damage to his greenhouse. The 8 panes cost $19.60. Unfortunately, he breaks 3
Sedaia [141]

Answer:

its 19. 60 just add it three more times and that is your answer

8 0
2 years ago
A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be 99% confiden
solmaris [256]

Answer:

Sample size n = 1382

so correct option is D) 1382

Step-by-step explanation:

given data

confidence level = 99 %

margin of error = 3%

probability = 25 %

to find out

How large a sample size needed

solution

we know here P = 25 %

so 1 - P = 1 - 0.25

1 - P  = 0.75

and we know E margin of error is 0.03 so value of Z for 99%

α = 1 - 99%   = 1 - 0.99

α  = 0.01

and  \frac{\alpha}{2} = \frac{0.01}{2}

\frac{\alpha}{2}  = 0.005

so Z is here

Z_(\frac{\alpha}{2}) = 2.576

so

sample size will be

Sample size n =  (\frac{(Z_(\frac{\alpha}{2})}{E})^2 * P * (1-P)

put here value

Sample size n = (\frac{2.576}{0.03})^2 * 0.25 * 0.75

Sample size n = 1382

so correct option is D) 1382

3 0
3 years ago
Nancy is very happy with the service at the hotel she is staying in. She wants to tip the room service waiter 15 percent of the
valina [46]
Easy way to find this out!

This is how I would do it:

1. Turn 15% into a decimal -->  0.15

2. Multiply 0.15 and 120.75 --> 18.11

3. Get your answer! $18
4 0
2 years ago
Read 2 more answers
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