Answer:
C. 10 people
Step-by-step explanation:
2/5 of 50 = 20
1/2 of 20 = 10
hope this helps, brainliest plz!!
A local reader’s club has a set of 12 hardback books, a set of 18 paperbacks, and a set of 36 magazines. Each set can be divided equally among the club members. What is the greatest possible number of club members?
The principal randomly selected six students to take an aptitude test. Their scores were: 76.5 85.2 77.9 83.6 71.9 88.6 Determine a 90% confidence interval for the mean score for all students.
Answer:
90% Confidence Interval = [75.50, 85.74]
Step-by-step explanation:
The principal randomly selected six students to take an aptitude test. Their scores were: 76.5 85.2 77.9 83.6 71.9 88.6 Determine a 90% confidence interval for the mean score for all students.
Step 1
We find the Mean and Standard deviation
Mean = Sum of terms/Number of terms
Mean = 76.5 + 85.2 + 77.9 + 83.6 + 71.9 + 88.6/6
Mean = 483.7/6
Mean = 80.61666667
Approximately = 80.62
Stand Deviation =
√(x - mean)²/n - 1
= √193.9483333/6 - 1
= √38.78966667
= 6.228135087
Approximately = 6.23
Step 2
If you look at the question, our number of samples is 6. This is a small sample size and it is less than 30 hence, the formula for Confidence Interval that we would be using is
Confidence Interval = Mean ± t × Standard deviation/√n
Where t = test score of the 90% confidence interval
Degrees of freedom = n - 1
= 6 - 1 = 5
t score for a 90% confidence interval = 2.015
Hence, Confidence Interval =
80.62 ± 2.015 × 6.23/√6
80.62 ± 2.015 × 2.5433868496
80.62 ± 5.1249245019
Confidence interval
= 80.62 - 5.1249245019
= 75.495075498
≈ 75.50
= 80.62 + 5.1249245019
= 85.744924502
≈ 85.74
90% Confidence Interval = [75.50, 85.74]
Which graph best represents −3x+5y=−15?
Answer:
A/ the first graph
Step-by-step explanation:
A customer service center receives about 10 emails every half-hour.
What is the probability that the customer service center receives exactly 5 emails in the next six minutes?
(Hint: Find the average number of emails in 6 minutes.)
Step-by-step explanation:
10 every 30 minutes means about one call every 3 minutes so in 6 minutes they should recieve 2 calls
Please helppp meeee for brainliest!! ❤️❤️
Answer:
I'm sorry but I couldn't see the hole question
I need help pls , I’m struggling
Answer:
Option A is correct.
Step-by-step explanation:
When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x). In other words, switch x and y and make y negative. Here x=4 and y=6 so on 90° rotation new co-ordinates of B are (-6,4).
Hope it helps you.
I need help with this
during flu season there was. 124 students out of school on a particular day if there are 775 students in the school what percent of them have the flu ?
Answer:
16% of the Students
Step-by-step explanation:
[tex]\frac{124}{775} * \frac{x}{100} \\124 * 100 = 12400\\12400 / 775 = 16\\x = 16\\\frac{124}{775} *\frac{16}{100} \\[/tex]
1. Multiple choice: Which irrational number is between 4 and 5.
b. 20
d. 180
a.
c. 734
2. Multiple choice: Which number is an integer?
a. - 11/5
b. -7
15
d. 1/2
3. Multiple choice: Which number is a whole number?
a. 5/6
b. -4
36
d.
500
4. Multiple choice: Which number is irrational?
a. 9.2727
b. 2
c. so
d. -37/71
5. Multiple choice: Any number with a finite decimal exapansion must be....
a. rational
b. irrational
6. Multiple choice: The number 3 is....
a. whole
b. rational
c. integer
d. all of the above
7. Multiple choice: All integers are ....
a. whole
b. rational numbers
c. irrational
Answer:
1. b, 20
Step-by-step explanation:
1. Irrational numbers between 4 and 5 are √17, √18,√19,√20,√21,√22,√23 ,√24.
Is this a direct variation y=x+x
Answer:
x2=3
x1=2
y=10
Step-by-step explanation:
PLEASE HELP ASAP!!!!!!!!!!! 13 points avaliable
Rectangle BCDE is shown on the coordinate grid. Rectangle BCDE is dilated with the origin as the center of a dilation using the rule (x,y) → (1/3x, 1/3y) to create rectangle B'C'D'E
I REALLY NEED HELP!! THANKS
Answer:
Step-by-step explanation:
Answer: Choice A) Rectangle B'C'D'E' is larger because scale factor is greater than 1.
Going from (x,y) to (3x,3y) means we multiply each coordinate by 3. This is the scale factor. The scale factor being larger than 1 means the new image is an enlargement compared to the original preimage. Specifically the dimensions of the new rectangle are 3 times larger.
bob rides his bike how many miles will bob have traveled if he stops after 180 minutes continuing his same pattern?
Answer:
36 miles.
Step-by-step explanation:
If you look, each time can be divided by 5 to get the miles. 180/5 is 36, so the answer is 36 miles.
Answer:
36 miles.
Step-by-step explanation:
Benjamin has 14.2 ounces of water for his plants. He has 10 plants and wants to give each plant the same amount of
water. How much water should each plant receive?
O 1.42 ounces
O 14.2 ounces
O 142 ounces
O 1,420 ounces
Answer:
1.42
Step-by-step explanation:
What you have to do is just divide 14.2 and 10 to get your answer.
Help! 13 points and brainliest!
Question in picture attached
Ms. Hodge receives 20 phone calls every 60 minutes. How many calls will she expect to receive in 180 minutes?
Ms. Hodge will expect to receive _____ phone calls in 180 minutes.
Answer:
60
Step-by-step explanation:
20 calls / 60 minutes
x calls / 180 minutes
60 x 3 = 180 minutes
20 x 3 = 60 calls
Answer:
Ms hodge will expect to receive 60 phone calls in 180 minutes.
Step-by-step explanation:
180 divided by 60 is 3
3x20= 60
Ms hodge will expect to receive 60 phone calls in 180 minutes.
Your car averages 18 mi per gal on the highway. If gas costs $1.85 per gal, how much does it cost in dollars per mi to drive your car on the highway?
Answer:
9.72
Step-by-step explanation:
ඞ
rewrite 1/2 book and 3/4 hour as a unit rate?
Answer:
2/3 book/hour
Step-by-step explanation:
1/2 multiplied by 4/3= 2/3
Alex finished a race in 6 minutes. How many seconds is this?
Answer:
360 second
Step-by-step explanation:
1 minute=60 second
so:
6 minutes * 60 second/minutes
=360 second
Explain how you can use mental math to solve 30 x 80?
Answer:
it equal 2400
but in an easier and a faster u can just
do 30
x80
------
hide number 8 put down the zero then hide the zero in the 80 and multiply normaly
Solve for y.
3(y-2) = y +4-2(-5y-2)
Simplify your answer as much as possible.
Answer:
y = -7/4
Step-by-step explanation:
Find the missing angle measures ASAP
Answer:
theres so many missing angle messures, which one do you want lol
Step-by-step explanation:
what is 8% of 70....?
Answer:
5.6
Step-by-step explanation:
8 x 70 = 5.6
100
70 = 100%
10% = 7
8% = 5.6
Omar and Meg just had business cards made. Omar's printing company charged a one-time setup fee of $5 and then $5 per box of cards. Meg, meanwhile, ordered hers online. They cost $4 per box. There was no setup fee, but she had to pay $10 to have her order shipped to her house. By coincidence, Omar and Meg ended up spending the same amount on their business cards. How many boxes of business cards did each buy?
Answer:
5 boxes each
Step-by-step explanation:
An auto club drove a new hybrid car 442.4 miles. They refilled the gas tank with 10.2 gallons of gas. How many miles per gallon did the hybrid car get? A. 4.33 B. 4.46 C. 43.37 D. 44.63
Answer:
The correct answer is D. The hybrid car got 43.37 miles pero gallon.
Step-by-step explanation:
To determine the number of miles traveled for each gallon of gasoline consumed by the car, the number of miles traveled must be divided by the number of gallons consumed.
Thus, if 442.4 miles were traveled and 10.2 gallons of gasoline were consumed, the following calculation should be performed:
442.4 / 10.2 = X
43.37 = X
Therefore, for every gallon consumed 43.37 miles were traveled.
Answer
The answer is C
Step-by-step explanation:
There are 13 fish in an aquarium. Seven of the fish are guppies. How many
non-guppies are in the aquarium?
A. the number of guppies
B. the total number of fish
C. the number of non-guppies
( what is the variable in the problem?)
Answer:
6 non-guppies; C. the number of non-guppies
Step-by-step explanation:
13-7=x
(x is the number of non-guppies)
13-7=6
Now for the top make it drop its the wap
Answer:
get the bucket get the mop it's a way it's a wap
Answer:
pop offfffffffffffffffffffffffffffffffffffffffffffffffffffff
Step-by-step explanation:
WILL GIVE BRAINLIEST!1 In the figure below, m <1 = 52. Find m / 2.
Answer:
3?
Step-by-step explanation:
can some one answer this for me?
Answer:
27 miles
Step-by-step explanation:
4 x 3 = 12
5 x 3 = 15
6 x 3 = 18
So, 9 x 3 = 27
Help!!! Thanks!!!!!!!
Answer:
Point in green colour.
Step-by-step explanation:
0.39=39/100=3.9/10 that means is close to 4/10
(04.01)
Which of the sets of ordered pairs represents a function? (4 points)
A = {(-4, 5), (1, -1), (2,-2), (2,3)}
B = {(2, 2), (3,-2), (9,3), (9, -3)}
O Only A
O Only B
O Both A and B
Neither A nor B
Answer:
A function can be any set of points where one input is equal to one output. You cannot have two X values with the same Y value, for example.
I believe the answer is neither because in both sets you can see they have different Y values for the X values 2 and 9.