Answer:
distributive property :)
How do you find lower class limit
Answer:
Its the upper limit and lower limit of the class
Help PLZ I am failling math
A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is the 90% confidence interval for the mean score, , of all students taking the test?
Answer:
29.5+/-1.11
= ( 28.39, 30.61)
Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x+/-zr/√n
Given that;
Mean x = 29.5
Standard deviation r = 5.2
Number of samples n = 59
Confidence interval = 90%
z-value (at 90% confidence) = 1.645
Substituting the values we have;
29.5+/-1.645(5.2/√59)
29.5+/-1.645(0.676982337100)
29.5+/-1.113635944529
29.5+/-1.11
= ( 28.39, 30.61)
Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)
What is the midpoint of KL¯¯¯¯¯¯
Answer:
I think that it would be -4.5
Step-by-step explanation:
Have a great day!
Answer:
-4.5
Step-by-step explanation:
yeahhhhhhh
1/3 + a =5/4
what does a equal
Answer:
the answer to this is a = 11/12
Step-by-step explanation:
NEGATIVE INTEGER LESS THAN -5
Answer:
-6
Step-by-step explanation:
-6, -7, -8... and so on are less than -5
Answer:
-6, -7, -8... etc.
Step-by-step explanation:
2. O
Mia buys ink at the office supply store for a business.
She buys 3 printer cartridges, and the sales tax is 7%. Write an expression
to represent the total cost of ink supplies in two different ways.
Answer:
The total cost of the ink supplies can be represented in two different ways, as follows:
a. 3p (1+r)
b. p * (1+ r) * 3
Step-by-step explanation:
a) Data and Calculations:
Number of printer cartridges bought = 3
Sales tax rate = 7%
The total cost can be represented as:
Total cost = 3p (1+r)
where p = the price of a printer cartridge
and r = the sales tax rate
Alternatively, the total cost can be represented as:
Total cost = p * (1+ r) * 3
b) Whichever expression is used, the total cost derived will remain the same. The first expression includes the sales tax in the total cost, while the second expression includes the sales tax in the cost of the unit before arriving at the total cost.
Answer:
3c+3c(0.07)
Step-by-step explanation:
A duck population is modeled by
Pn=200⋅(1.02)n
where n is the number of years after the year 2010. How many ducks does the model predict for the year 2025? Round to the nearest whole number of ducks.
Answer:
3060 ducks
Step-by-step explanation:
There are 2 possibilities here. We can plug in 15 for n since 2025 is 15 years after 2010, or we can graph it and find the value.
If we do the first method, we have
[tex]P=200*1.02(15)\\P=3060[/tex]
So the population in 2025 is 3060 ducks.
We can check our answer by graphing on a calculator. If we enter the equation and then use calc>value we can see that when x=15, y=3060.
Hope this helps!
In a fruit punch drink, the 3 ingredients are apple juice, orange juice and cranberry juice. If 2/7 of
the drink is apple juice and 1/2 is orange juice then write the ratio of cranberry juice to apple
juice to orange juice in its simplest form,
Answer:
3 : 4 : 7
Step-by-step explanation:
apple juice - 2/7 = 4/14
orange juice - 1/2 = 7/14
AJ + OJ = 11/14
this means that 3/14 of the punch is cranberry juice.
cranberry : apple : orange
3 : 4 : 7
Finish the following table for the given function with x as the independent variable. x 10 10 15 10 15 Ax) = V100- x
a. 95, 90, 85
b. 9.75, 9.49, 9.22
C. 9.75, 9.22, 9.49
d. 10, 9,8
Answer:
Option (b) is true.
Step-by-step explanation:
Given the function
[tex]f\left(x\right)=\sqrt{100-x}[/tex]
plug in x = 5 in the function
[tex]f\left(5\right)=\sqrt{100-5}[/tex]
[tex]\:f\left(5\right)=\sqrt{95}\:\:\:\:[/tex]
[tex]f(5) = 9.75[/tex]
plug in x = 10 in the function
[tex]f\left(10\right)=\sqrt{100-10}[/tex]
[tex]\:f\left(10\right)=\sqrt{90}\:\:\:\:\:[/tex]
[tex]\:f\left(10\right)=9.49[/tex]
plug in x = 15 in the function
[tex]f\left(10\right)=\sqrt{100-15}[/tex]
[tex]\:f\left(10\right)=\sqrt{85}\:\:\:\:\:[/tex]
[tex]\:\:f\left(15\right)=9.22[/tex]
Thus, the table will be:
x f(x)
0 10
5 9.75
10 9.49
15 9.22
Therefore, option (b) is true.
Find the value of x that will make A||B.
А
5X
(4x + 12
x
< = [?]
Answer:
x=12
Step-by-step explanation:
Lines A and B are parallel, with a transversal passing through them.
The properties of two parallel lines and a transversal tells us that angles 5x and 4x+12 must be equal, because they are a pair of alternate exterior angles.
To solve for x, we do 5x=4x+12
Subtract 4x on both sides
x=12
Answer: 12
Step-by-step explanation:
Brian is skateboarding at 8 kilometers per hour. How long will it take Brian to travel 12 kilometers?
Answer:
An hour and 30 minutes.
Step-by-step explanation:
In one hour, they travel 8 kilometers. They then have 4 kilometers left. 4 is half. of 8, so I would possibly take half the time it would to travel 8, making it 30 minutes for the other 4 kilometers.
how to solve 52/48 in the form of hcf
HCF is 4
Step-by-step explanation:
factors of 52 are: 2x2x13
factors of 48 are:2x2x2x2x3
common factors of 52%48 are: 2
hence, = 2x2
=4
hope it helps
En una baraja de 52 cartas, donde hay 13 cartas de trébol. 13 cartas de
corazones, 13 cartas de espadas y 13 cartas de rombos. Si sacamos dos
cartas con reemplazo. ¿Cuál es la probabilidad de que sean de
corazones?
While doing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. Her sample consisted of 20 students with a mean of $212.45 and a standard deviation of $38.92. A. Find the 99% confidence interval estimate of the true mean textbook cost for the semester based on her sample. Assume the cost of new textbooks is normally distributed.B. Based on part a, is an average cost of $200 for a semester a likely value for the population mean? Why or why not?
Answer:
The answer is below
Step-by-step explanation:
Given that:
mean (μ) = $212.45, standard deviation (σ) = $38.92 and sample size (n) = 20 students.
a) Confidence (C) = 99% = 0.99
α = 1 - C = 1 - 0.99 = 0.01
α/2 = 0.01/2 = 0.005
The z score of α/2 is the same as the z score of 0.495 (0.5 - 0.005) which is equal to 2.576. This means that Z(α/2) = 2.576
The margin of error (E) is given as:
[tex]E=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} } \\\\Substituting:\\\\E=2.576*\frac{38.92}{\sqrt{20} } \\\\E=8.7[/tex]
The confidence interval = (μ ± E) = (212.45 ± 8.7) = (203.75, 221.15)
Hence the 99% confidence interval is between 203.75 and 221.15.
b) The population mean is the same as the sample mean. Hence the population mean = $212.45
PLEASE HELP MEEEEEE I REALLY NEED HELP WITH THISSSSSSSSS QUESTION PLEASE I NEEEEDDD HELPPPP IM BEGGGING YOUUUU
Answer:
volume of figure = 74 cm³
Jaime is 16 years older than Savannah. Ten years ago, the sum of their ages was 60. How old are they now?
Jaime is ____years old, and Savannah is ____ years old.
Answer:
Jaime is _48_years old, and Savannah is _32_ years old.
Step-by-step explanation:
Jaime is 16 years older than Savannah
Ten years ago, the sum of ages = 60.
(60-16)=22
Ten years ago, Jaime=22+16=38y but now Jaime is 48 (38+10)
Ten years ago, Savannah = 22y but now Savannah is 32y (22+10)
hope this helps
Write
3
8
as a decimal.
Enter
Copyright © 2003 - 2020 Acellus Corporation. All Rights Reserved.
Answer:
the answer is 0.375
Step-by-step explanation:
hope this helps
Assuming the pattern continues, what are the next two terms in the pattern: A, D, G, J, ______?
Answer:
m, p
Step-by-step explanation:
273+147+325 how much is it all together
Answer:
745
Step-by-step explanation:
Answer:
745.
Step-by-step explanation:
Next time you can use a calculator so you don't use up your points if you want.
I hope this helped and if it did I would appreciate it if you marked me Brainliest. Thank you and have a nice day!
Triangles A B C, D E F, G H I, and J K L are shown. Angles A C B, D F E, H I G, and K L J are right angles. The length of side A C is 14 and the length of side C B is 20. The length of side E F is 8 and the length of F E is 10. The length of H I is 15 and the length of I G is 12. The length of K L is 10 and the length of L J is 7. The lengths of the hypotenuses are not given. Which pairs of triangles are similar? Check all that apply. △ABC ~ △DEF △DEF ~ △GHI △GHI ~ △ABC △GHI ~ △JKL △JKL ~ △ABC
Answer:
B) △DEF ~ △GHI
E) △JKL ~ △ABC
Step-by-step explanation:
i just did the assignment
The pairs of triangles are similar
△DEF ~ △GHI and △JKL ~ △ABC.
What is similarity ?If two triangles have an equal number of corresponding sides and an equal number of corresponding angles, then they are comparable. Similar figures are described as items with the same shape but varying sizes, such as two or more figures.
Given:
AC = 14
BC = 20
DF = 8
FE= 10
HI = 15
IG = 12
KL = 10
LJ = 7
As, In Right Triangle we can use Pythagoras theorem
AB = √14²+ 20² = 24.41
DE= √8²+10²= 12.8
HG= √15²+ 12² = 19.2
KJ= √10² + 7² = 12.2
Then, from the ratio of Corresponding sides we get
△DEF ~ △GHI and △JKL ~ △ABC.
Learn more about similarity here:
https://brainly.com/question/26451866
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The length of a beige is 500 miles if 1 inch represent 25 miles what is the length of the bridge ?
Answer:
20 inch
Step-by-step explanation:
500 divided by 25 is 20.
Since 20% of 950 is
students can use
?
square feet of the courtyard.
190 square feet.
Step-by-step explanation:
In this problem, we assume that the courtyard measures 950 square feet.
So, 20% of 950 is
That is, the 20% of the courtyard is 190 square feet.
Therefore, the complete statement is
Since 20% of 950 is 190 , students can use 190 square feet of the courtyard:
190 square feet.
Step-by-step explanation:
In this problem, we assume that the courtyard measures 950 square feet.
So, 20% of 950 is
20 \%(950)=\frac{20}{100}950=\frac{1}{5}950= 190ft^{2}20%(950)=
100
20
950=
5
1
950=190ft
2
That is, the 20% of the courtyard is 190 square feet.
Therefore, the complete statement is
Since 20% of 950 is 190 , students can use 190 square feet of the courtyard
Improvements in which area would help reduce the possibility of damage to the environment when using uranium as a fuel?
more-efficient extraction techniques
better control of fusion reactions
stronger-pumping wells
thicker shielding around the reactor
Answer:
Improvements in which area would help reduce the possibility of damage to the environment when using uranium as a fuel?
A.) more-efficient extraction techniques
Step-by-step explanation:
To curb these detrimental effects, it is required to provide more-efficient extraction techniques when using uranium as a fuel.
What are environmental pollutants?Environmental pollutants are substances released into the natural environment that cause negative effects, such as damaging health or inflicting various sorts of damage.
Uranium mining has far-reaching consequences, polluting the environment with radioactive particles, radon gas, water-borne pollutants, and higher concentrations of radiation levels.
To curb these detrimental effects and to improve the possibility of damage caused to the environment, it is required to provide more-efficient extraction techniques when using uranium as a fuel.
Learn more about environmental pollutants here:
https://brainly.com/question/9420026
#SPJ2
find two numbers a and b for which a+2b=100 and the product ab is maximized
2. A principal of $4.570 is placed in an account that earns 4.5% interest. If the interest is compounded annually, how
much money will be in the account at the end of 5 years?
а
$4654.15
b
$4775.65
С.
$5638.75
d
S5695.05
Please help I will give the brilliance
Answer:
D
Step-by-step explanation:
evaluate 3x(x-2)/ 2x-1 when x=0
Someone help please!!!
Answer:
y intercept = -5
slope= 4
equation: y = 4x - 5
EXPLANATION:
FIRST, you must write the formula for a linear graph , which is y = m(x) + c
where y is any y component and x is it's corresponding x component , m is the gradient or slope and c is the constant or y intercept.
SOLUTION:
y = mx + c
finding the gradient (m)
m = y2 - y1
x2 - x1
=( (-1)-(-5) ) ÷ (1-0)
= -1+5 ÷ 1
= 4
Therefore, the slope is 4
finding the y intercept.
y = 4x + c
in the above equation, I substituted the value I had for the slope or the gradient or m.
SO NOW IM ABOUT TO FIND C
TO FIND C, YOU MUST FIRST PICK A CORRESPONDING Y AND X COMPONENT.
I CHOOSE MY Y = 3 and X = 2
Now I'm going to substitute those values into the formula.
(3) = 4(2) + C
since it's an equation with one variable, no need for simultaneous equations.
3 = 8 + c
3-8 = c
-5 = c
SO THATS HOW WE ARRIVED AT -5 AND 4.
WITH THAT, the equation of the line is y = 4x - 5.
I HOPE IT WAS HELPFUL.
I REALLY NEED HELPPPPP
DONT BE SHYYYY HELP MEH
sersly no one can help????
Answer:
Expression: [tex] \frac{40}{y - 16} [/tex]
When y = 20, the value of the expression is 10.
Step-by-step explanation:
The expression for the phrase "difference of a number, y, and 16" is (y - 16).
Therefore, the quotient of 40 and the "difference of a number, y, and 16" would be written as:
[tex] \frac{40}{y - 16} [/tex]
Let's evaluate the expression when y = 20.
Substitute y = 20 into [tex] \frac{40}{y - 16} [/tex].
Thus:
[tex] \frac{40}{20 - 16} [/tex]
[tex] = \frac{40}{4} = 10 [/tex]
Reid earns $9.00 per hour painting furniture and has already earned $22.50. The number of hours, x, for which Reid painted can be found using the equation 22.50=9x.
How many hours did Reid paint?
Answer:
2.5 hours or 2 hours and 39 min
Step-by-step explanation:
22.50/9