A sample with a mean of M = 8 has EX = 56. How many scores are in the sample?
The number of scores is n =
Answer:
[tex]n = 7[/tex]
Step-by-step explanation:
Given
[tex]\bar x = 8[/tex] --- the mean
[tex]\sum x = 56[/tex] --- sum of scores
Required
The number of scores (n)
This is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
Make n the subject
[tex]n = \frac{\sum x}{\bar x}[/tex]
[tex]n = \frac{56}{8}[/tex]
[tex]n = 7[/tex]
Calculate the area of a circle with radius 5.1cm
Answer:
A= 81.6714
Step-by-step explanation:
A=πr^2
A=3.14x5.1x5.1
A= 81.6714
hope this helps ^^
solve x 9/× = x/4 what is x
Answer:
x = - 6, x = 6
Step-by-step explanation:
[tex] \frac{9}{x} = \frac{x}{4} \\ \\ x \times x = 9 \times 4 \\ \\ {x}^{2} = 36 \\ \\ x = \pm\sqrt{36} \\ \\ x = \pm 6 \\ \\ x = - 6, \: \: x = 6[/tex]
Siri is grocery shopping. She is buying macaroni. One box is 6 inches long, 1 inch wide and 9
inches tall. The second box is 3 inches long, 3 inches wide and 6 inches tall. Which box holds
more macaroni?
Answer:
The second box
Step-by-step explanation:
The volume of a pyramid can be given by the formula: V=31Ah. Where. A: Area of the V=(1/3)(B)(h)
multiply both sides by 3
3V=Bh
divide both sides by B
3V/B=h
Therefore, If it is wider it has more space to carry more items such as macaroni.
A movie theater has been charging $10.00 per person and selling about 500 tickets on a typical weeknight. After surveying their customers, the theater management estimates that for every 50 cents that they lower the price, the number of moviegoers will increase by 50 per night. Find the demand function. (Let x represent the number of tickets sold and p represent the price.)
Answer:
[tex]p(x) = -0.01x + 15[/tex]
Step-by-step explanation:
Given
Let x represent the number of tickets, and p the charges
[tex](x_1,p_1) = (500,10)[/tex]
A reduction of 50c gives an increment of 50 tickets.
This gives:
[tex](x_2,p_2) = (500+50,10-0,5)[/tex] ---- [tex]50c = \$0.5[/tex]
[tex](x_2,p_2) = (550,9.5)[/tex]
Required
Determine the demand function
First, calculate the slope:
[tex]m = \frac{p_2 - p_1}{x_2 - x_1}[/tex]
[tex]m = \frac{9.5 - 10}{550-500}[/tex]
[tex]m = \frac{-0.5}{50}[/tex]
[tex]m = -0.01[/tex]
So, the equation is:
[tex]p = m(x - x_1) + y_1[/tex]
[tex]p = -0.01(x - 500) +10[/tex]
[tex]p = -0.01x + 5 +10[/tex]
[tex]p = -0.01x + 15[/tex]
Hence, the function is:
[tex]p(x) = -0.01x + 15[/tex]
what is the resistance of a circuit if it has a voltage of 50v and a current of 8 ? and show me the calculations
Answer:
25/4 ohm
Step-by-step explanation:
Use Ohm‘s Law: V=IR which stands for Voltage = Electric Current * Resistance.
Plug in your given values: 50 = 8R. R = 25/4 ohm.
Solve each equation below for the variable given.
134+ p =74 p =
25/8 + m = 7 1/8 m =
Answer: For the first one: P=-60
The second one: m=4
Step-by-step explanation:
134+p=74
You move to the right and you change the sign
Like this: p=74-134
Then you Calculate the difference
So p=-60 which is your answer
The second one: 25÷8+m=7 1/8
You divide the numbers like this:3.125m=7 1/8
Convert the mixed number into an improper fraction.. like this: 3.125+m=57/8
Move constant to the right and change the sign
Like this: m=57/8 - 3.125
Convert the decimal into a fraction
m=57/8-25/8
Then you Calculate the difference
So it will be m=4 which is your answer
Let me know if this helps
I need help please ASAP?!!!!
Answer:
no real numbers will make this equation true
Step-by-step explanation:
if you square both sides, you'll get sqrt(-49). this will get you an imaginary number (7i) which is not a real number.
Please help 30 points pls
Answer:
4.75b; 8
Step-by-step explanation:
Area of triangle: height ÷ 2 × base
38 = 9.5 ÷ 2 × b
= 4.75 × b
38 = 4.75b
b = 38 ÷ 4.75
b = 8
Answer:
4.75 & 8
Step-by-step explanation:
Hope this helps
Bryan has a collection of baseball cards which he shares equally with his brother, Jude. Bryan also received two cards from his friend, Gene. If Bryan has 8 baseball cards now, how many cards did he originally have in his collection?
Answer:
X= 7
Step-by-step explanation:
A farmer picked 496 oranges. He also picked 435 lemons. Which shows
how many more oranges than lemons he picked?
496 X 435
496 ÷ 435
496 - 435
496 + 435
Answer:
C
Step-by-step explanation:
:)
Please help me do not and please give me an explanation too please. No link please
Answer:
I'm pretty sure it's D.40 because it's the biggest number and 6+13+17 is only a bit bigger than 24. Also, all the numbers add up to 60 and 27 is only a bit less than 50% of 60
a recipe calls for 3/4 of a cup of flour to make 5/8 of a pond of bread dough . how many cups of flour are needed to make 1 pound of douugh
Which type of graph uses images to represent data?
line graph
bar graph
pictograph
pie chart
Answer:
pictograph is a type of graph that use images to represent data or a given information and it is also called picture graph
This to me makes no sense but i wanna see if people know this +100 point question;
FOLLOW THE CORRECT STATEMENT, IN ORDER
please figure out how to do the problem bellow, and go below the project and see until the 8th ppi.
The following 8x8-1+9-90+1000-00.89=______? THIS ANSWER IS REQUIRED*
Take the following answer above and figure out the question; _____+4005-00000.98- 400+1=___?
Answer:
981.11
981.11+4005-00000.98- 400+1=4586.13
Step-by-step explanation:
Just order of operations
Hope this helps!
Answer:
981.11
Step-by-step explanation:
Find the surface area
Will give brainliest to first answer!!!!
In this arithmetic sequence 3, 8, 13, 18, ... which term has the the value 123?
25
24
617
613
Answer:
term 25
Step-by-step explanation:
a is the number added from 3 to 8 is 5(must be constant like 8 to 13 is also 5
b is the zero term so 3-a which is 3-5=-2
need help geometry question central angles and arcs pls???
Answer:
75°,
mUV = 105°, the other 2 are both 75°. This means mTU = 75°
What is 0.5 (0.1)(1/2)
Answer:
0.025
Step-by-step explanation:
PLEASE I NEED HELP I GOT A PUPPY AND IM EXHAUSTED HE DOESNT SLEEP AT NIGHT
Answer:
False
Step-by-step explanation:
Plug 16 into the function as x
16+12=28
4≠28
Consider the following graph.
The x y coordinate plane is given. The curve begins at (0, 5) goes down and right becoming less steep, changes direction at (1, 2) goes up and right becoming more steep, goes through the approximate point (2, 3.1), goes up and right becoming less steep, changes directions at (3, 4), goes down and right becoming more steep, sharply changes direction at (4, 1), goes up and right becoming less steep passing through the approximate point (5, 4.2) and ends at (6, 6).
(a) Find the interval(s) on which f is increasing. (Enter your answer using interval notation.)
(b) Find the interval(s) on which f is decreasing. (Enter your answer using interval notation.)
(c) Find the open interval(s) on which f is concave upward. (Enter your answer using interval notation.)
(d) Find the interval(s) on which f is concave downward. (Enter your answer using interval notation.)
(e) Find the coordinates of the point(s) of inflection.
(x, y) = ( )
a)Function is increasing in intervals (1,3) and (4,6).
b)Function is decreasing in intervals (0,1) and (3,4).
c)Graph is concave upward in the interval (0,2) and (3,5).
d)Graph is concave downward in the interval (3,4).
e)Points of inflection are x=3 and x=5.
Let us make the graph of the given function. In the graph, We have connected points linearly, please consider it as a curve.
What is the point of inflection?The point of inflection or inflection point is a point in which the concavity of the function changes.
Therefore, From the attached graph, we can see that:
a)Function is increasing in intervals (1,3) and (4,6).
b)Function is decreasing in intervals (0,1) and (3,4).
c)Graph is concave upward in the interval (0,2) and (3,5).
d)Graph is concave downward in the interval (3,4).
e)Points of inflection are x=3 and x=5.
To get more about graphs visit:
https://brainly.com/question/1869945
Answer:
a.(1,3)U(4,6)
b.(0,1)U(3,4)
c.(0,2)
d.2,6
e. 2,3
Step-by-step explanation:
Looking at graph and finding intervals.
Consider the inequality x > -10 1/2
Select all options for below that would make this inequality true.
-11
0
11.5
-10 1/4
-16
Answer:
bddjjd
Step-by-step explanation:
8. Calculate.
a) -114 x 15
Answer:
[tex] - 1710[/tex]
Step-by-step explanation:
[tex] - 114 \times 15 \\ = - 1710[/tex]
How can postulates and theorems relating to similar
and congruent triangles be used to write a proof?
How do you graph x+6y=0
Answer:
We need to put this equation into either form of a line, pererably, slope intercept form!
Step-by-step explanation:
To do this, out goal is to get y alone.
1. We subtract x on both sides.
2 We divide 6 on both sides.
3. Our answer is y= -x/6 ( negative x divided by 6)
4. The y-intecept value is when x is equal to zero, so plug in 0 for x and solve for y.
5. The y intercept is (0,0)
6. From (0,0) point, you go down -1 and move 1 to the right each time!
The graph will be a line with a slope of -1/6 that passes through the points (0,0), (6,-1), and (-6,1).
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
To graph this equation, start by rearranging it to solve for y.
y = -x/6
Next, plot a few points to fill in the graph.
when x is 0,
y is 0.
When x is 6,
y is -1, and
when x is -6, y is 1.
Finally, connect the plotted points with a straight line.
The final graph will be a line with a slope of -1/6 that passes through the points (0,0), (6,-1), and (-6,1).
Hence, graph will be a line with a slope of -1/6 that passes through the points (0,0), (6,-1), and (-6,1).
To learn more on Graph click:
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the thief with the stolen accordion has been traveling on a raft for 2 hour 40 minutes from Village Ivanovo toward Village Sosnovka. Aniskin immediately leaves Sosnovka in a motorboat and travels upstream toward the raft. Aniskin catches the thief 27 km from Sosnovka. Find the speed of the raft if the speed of the motorboat in still water is 12 km/h and the distance from Ivanovo to Sosnovka is 44 km.
Answer:
3 km/hStep-by-step explanation:
Let the speed of raft (current) - rSpeed of motorboat - 12 km/hThe distance between villages - 44 kmLet the time spent by Aniskin - tThe time the thief was in travel = 2 hr 40 min + t = 2 40/60 + t = 3/8 + tThe distance the thief traveled = 44 - 27 = 17 kmWe have following equations:
r(8/3 + t) = 17(12 - r)t = 27Simplify the equations:
r(8/3 + t) = 17 ⇒ rt + 8/3r = 17(12 - r)t = 27 ⇒ 12t - rt = 27Add up the equations and solve for r:
rt + 8/3r + 12t - rt = 448/3r + 12t = 44r = 16.5 - 4.5tSubstitute r into second equation:
(12 - 16.5 + 4.5t)t = 274.5t² - 4.5t = 279t² - 9t - 54 = 0Solving we get
t = 3 hFind r:
r = 16.5 - 4.5*3 = 3 km/hAnswer:
Step-by-step explanation:
ann and bill share an amount of money in ratio 7:n. Ann gets 28%of the money. workout value of n
Solve the inequality.
-7/8 < m - 13/8
Answer:
m>3/4
Step-by-step explanation:
Add -13/8 to both sides:
6/8<m
Simplify:
m>3/4
Let's assume our class is truly representative of the population at large. (a) Calculate the probability of having three right handed people in a sample of 10. Do this using R. (b) repeat, but this time calculate the probability of 3 or less right handed people in a sample of 10.n=17 right handed= 15 left handed=2
Answer:
0.1171875;
0.171875
Step-by-step explanation:
It is either a person is right handed or left handed
P(right handed) = 1/2
Probability of having 3 right handed people in a sample of 10 ;
P(x =x) = nCx * p^x * (1 - p)^(n - x)
P(x = 3) = 10C3 * 0.5^3 * 0.5^7
P(x = 3) = 120 * 0.125 * 0.0078125
P(x = 3) = 0.1171875
Using R ;
P(x ≤ 3)
We can obtain these from R using ;
pbinom( r, n, p)
pbinom(3, 10, 0.5) = 0.171875
the question is in the picture!!
9514 1404 393
Answer:
(b) ... because of the AA similarity postulate
Step-by-step explanation:
The problem statement tells you that you are showing ∠F≅∠C. We already know that ∠A≅∠D, because they are both marked as right angles. Thus the given mapping results in two of the three angles being shown congruent, allowing you to conclude ...
ΔABC ~ ΔDEF because of the AA similarity postulate . . . . choice B