Answer:
True
Step-by-step explanation:
have a great day!
X 0 1 2 3 4 5 P(X) 0.10 0.20 0.45 0.15 0.05 0.05 Using the above information, the standard deviation of the number of accidents is A. 1.18 B. 1.4 C. 1.81 D. 1.96
Answer:
1.18
Step-by-step explanation:
Given the data:
X 0 1 2 3 4 5
P(X) 0.10 0.20 0.45 0.15 0.05 0.05
E(x) = (0*0.1) + (1*0.2) + (2*0.45) + (3*0.15) + (4*0.05) + (5*0.05) = 2
Var(x) = [((0^2)*0.1)+((1^2)*0.2)+((2^2)*0.45)+((3^2)*0.15)+((4^2)*0.05)+((5^2)*0.05)] - 2²
5.4 - 4
= 1.4
Standard deviation = √var(x)
Standard deviation = √1.4
Standard deviation = 1.183
Standard deviation = 1.18
Answer:
hope this helps.enjoy
Sales of video games and consoles fell from $1.15 million to $1.03 million in 1 year. Find the percent decrease.
Answer:100 times 7
Step-by-step explanation: because
The parallelogram shown bellow has an area of 15 units over 2
Answer:
The value of h is [tex]\frac{5}{2}[/tex] units
Step-by-step explanation:
In any parallelogram, there are two different pair of bases b1, b2 and their corresponding heights h1, h2, where h1 ⊥ b1 and h2 ⊥ b2The area of parallelogram = b1 × h1 OR b2 × h2In the given figure
∵ Every two opposite sides of the parallelogram are equal
∴ The length of the base of the height h is 3 units
∵ The area of the parallelogram = [tex]\frac{15}{2}[/tex] units
∵ Area of parallelogram = b × h
→ Substitute the values of the area and the base in the rule above
∴ [tex]\frac{15}{2}[/tex] = 3 × h
∴ [tex]\frac{15}{2}[/tex] = 3h
→ Divide both sides by 3 to find h
∵ [tex]\frac{15}{2}[/tex] ÷ 3 = 3h ÷ 3
∴ [tex]\frac{15}{6}[/tex] = h
→ Simplify the fraction by divide up and down by 3 and switch the 2 sides
∴ h = [tex]\frac{5}{2}[/tex] units
hey, I wanted to know if anybody was kind enough to help me solve this! I'm super confused and I just don't know what to do. please help me, it'll mean a lot to me. actually
Answer:
The answer should be B
(2x + 9x² – 21) = (x +4)
Answer:
Step-by-step explanation:
Completing the Square
Solve each equation by completing the square.
1) 7x2 + 14x - 65--9
Answer:
2(30-7x)
Step-by-step explanation:
=14+14x-65-9
=14+14x-79
=60+14x
=2(30-7x)
A recipe says, "3 parts water to 1 part milk." How much water will you need if you use 2 liters of milk?
Answer:
6 liters
Step-by-step explanation:
2 liters of milk will need 6 liters of water.
What are algebraic expressions?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that a recipe says - "3 parts water to 1 part milk".
Now, we can write that -
3 parts water needs 1 part milk
This means, 1 litre milk needs 3 liters of water.
Then, 2 liters of milk will need (2 x 3) = 6 liters of water.
Therefore, 2 liters of milk will need 6 liters of water.
To solve more questions on algebraic expressions, visit the link below -
brainly.com/question/1041084
#SPJ2
Twenty-seven less than eight times a number is equal to five. What is the number?
Please answer this correctly without making mistakes
Answer:
First figure out how many cups are in a gallon. 16 .
Next multiply 16×3= 48
Finally you divide price per cup or 20.16/ 48.
The cost is .42 cents per cup.
When twice a number is decreased by 4, the result is 236. What
is the number?
I REALLY NEED HELP WITH THESE PROBLEMS I WILL AWARD BRAINLIEST
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How many solution does the following equation have -5 + 7x = 7x + 5
Answer:
No solution
Step-by-step explanation:
Because when you add 5 on both sides to take away the negative 5 it does not show a true statement. Since:
7x does not equal 7x + 10
Robert say's he needs 250 plastics sleeves for his baseball card collection , He has 3084 baseball cards . Each sleeves holds 12 cards do you agree With Robert?
Answer:
no, he needs 257 sleeves
Step-by-step explanation:
3,084 ÷ 12 = 257
You start an account with $2,500 and an annual interest rate of 6.5% compounded yearly. How much is in the account after 7 years?
I need an expression and a solution
I'm pretty sure it's this:
Answer:
y=a( 1+ r/n)^ nt
growth is a= 2500 yearly is n= 1
y= 2500( 1+ .065/1)^ 1.7 = $3884.97
select the correct answer(click the photo)
Answer:
B.
General Formulas and Concepts:
Order of Operations: BPEMDASEquality PropertiesStep-by-step explanation:
Step 1: Define function
f(x) = 8x + 4
Step 2: Prep
Rewrite: y = 8x + 4Swap x and y: x = 8y + 4Step 3: Find Inverse (Solve for y)
Subtract 4 on both sides: x - 4 = 8yDivide both sides by 8: (x - 4)/8 = yRewrite: y = (x - 4)/8Rewrite: f⁻¹(x) = (x - 4)/8Please give me a good explanation on how to do problems like this as well as solving this problem.
Answer:
Alright!
Step-by-step explanation:
Reflecting across the x-axis, the x-coordinate ALWAYS remains the same, but the y-coordinate is transformed into its opposite. If you forget this, fold along the x line, and you should be able to figure it out. Reflecting across the y-axis, the y-coordinate ALWAYS remains the same, but the x-coordinate is transformed into its opposite. If you forget this, fold along the y line, and you should be able to figure it out.
Hope I helped!
The temperature drops from 7°F to -17°F. By how much did the temperature decrease?
Answer:
24 degrees
Step-by-step explanation:
If you use 0 as kind of a benchmark it is really useful, frist you subtract 7, because it is our positive number., then you subtract 17 from 0, making -17.
7+17=24
Last Sunday 1,575 people visited the amusement park. 56% of the visitors were adults, 16% were teenagers, and 28% were children ages 12 and under. How many people at the amusement park were not adults?
Answer:
44% was not adults.
Step-by-step explanation:
28%+16%=44%
Does the type of employment make a difference in how much someone saves for retirement? A researcher gathers data on how much money government employees and corporate employees put in their retirement accounts each month as a percentage of their income.
Answer:
absolutely
Step-by-step explanation:
because if you make more money at work, the more money you have for retirement.
Answer:
testing a claim about two population means
Step-by-step explanation:
maybe that's the answer you are looking for :) I did this already and it was correct
ANY EXAPLE OF DISTRIBUTIVE PROPERTY FAST!!!
Answer:
My example: 7(2 + 7) = 7(2) + 7(7)
Formula: x(y + x) = x*y + x*x
Step-by-step explanation:
The distributive property can be represented by the following equation:
x(y + x) = x*y + x*x
Since you are looking for any example, let's plug in a few numbers to the above equation.
Ex) x = 7, y = 2
The example equation with these values is 7(2 + 7)
Solving With Distributive Property:
x(y + x)
Substitute
7(2 + 7)
Simplify using distributive property
7(2) + 7(7)
14 + 49 = 63
Solving using PEMDAS and solving inside the parenthesis first
7(2 + 7)
7(9)
63
The above is an example of solving/siplifying equations with and without the Distributive Property.
Since these numbers are the same, we can conclude that the formula for the distributive property above is correct.
Again, you are looking for an example, so simply pick a value for x and y and substute into this equation: x(y + x) = x*y + x*x
I used 7 and 2 above, but any numbers will work as you are distributing the value outside the parenthesis.
Hope this helps! Let me know if you have any questions.
PEMDAS simpliy means that the solving of equations can be solved by going in the following order:
- Parenthesis (P)
- Exponents (E)
- Multiplication and Division left to right of the expression/equation (M/D)
- Addition and Subtraction (A/S)
This is just a helpful little refrence when applying the order of operations.
I got this wrong as well. Can someone explain to me this?
Answer:
-1.5 and 1.5
I don't have those sings but -1.5 goes on the first box and 1.5 goes on the second one
Ms. Figgs asked 25 students in her 7th-grade homeroom to select their favorite cookie. The results are recorded in the table below. Based on the results, how many students will NOT select chocolate chip as their favorite cookie, if there are 250 students in the seventh grade?
Step-by-step explanation:
Can you show a picture of the table, I can't help if I don't see the whole problem
ne serving of ice cream has 140 calories and a mass of 60 grams.
How many calories are in 15 grams of ice cream?
Answer:
35 Calories
Step-by-step explanation:
15 is 1/4 of 60
60/15 = 4
140/4 = 35
Since 15 is 1/4 the size of 60, the number of calories will be 1/4 the amount as well. That is why you divide 140 by 4 to find the total calories for the mass of 15.
A random survey of 30 students found that 17 played a musical instrument. If the school has 450 students, predict how many do not play an instrument.
Given:
A random survey of 30 students found that 17 played a musical instrument.
Total number of students = 450
To find:
Estimated number of students who do not play an instruments.
Solution:
A random survey of 30 students found that 17 played a musical instrument.
Let E be the event that student play an instrument.
So, probability that a student plays an instrument is
[tex]P(E)=\dfrac{17}{30}[/tex]
Probability that a student do not play an instrument is
[tex]P(E')=1-P(E)[/tex]
[tex]=1-\dfrac{17}{30}[/tex]
[tex]=\dfrac{13}{30}[/tex]
Now, number of students who do not play an instruments is
[tex]450\times P(E')=450\times \dfrac{13}{30}[/tex]
[tex]450\times P(E')=195[/tex]
Therefore, 195 students do not play an instrument.
Meg laid 15 tiles in 50 minutes.
Jessica worked for 85 minutes at a faster rate per tile than Meg.
Choose all the rates that could be Jessica’s rate.
A: 20 tiles in 85 minutes
B: 24 tiles in 85 minutes
C: 28 tiles in 85 minutes
D: 1 tile in 3 minutes
E: 1 tile in 4 minutes
Answer:
I think C and E
Step-by-step explanation:
meg played at lace of 3.3333 tiles a minute so has to be over 25 tiles
The correct options are C and D.
Important information:
Meg laid 15 tiles in 50 minutes.Jessica worked for 85 minutes at a faster rate per tile than Meg.Rates:The rate per tile of Meg is:
[tex]\text{Rate}=\dfrac{\text{Time}}{\text{No. of tiles}}[/tex]
[tex]\text{Rate}=\dfrac{50}{15}[/tex]
[tex]\text{Rate}=3.333...[/tex]
Calculate the rates per tile for each option.
[tex]\frac{85}{20}=4.25[/tex]
[tex]\frac{85}{24}=3.54167...[/tex]
[tex]\frac{85}{28}=3.0357...[/tex]
[tex]\frac{3}{1}=3[/tex]
[tex]\frac{4}{1}=4[/tex]
From the above calculation is clear that the time spent per tile is less than Meg's rate in options C and D.
Therefore, the correct options are C and D.
Find out more about 'Rates' here:
https://brainly.com/question/17879320
A company had 260 workers. After a few of them were laid off by the company, there were 247 workers in total. What was the percentage decrease in the number of workers in the company?
Answer:
0.95% decrease
Step-by-step explanation:
247/260 to get your answer
Please help ASAP !!!!!
Answer:
i need points im really sorry
Step-by-step explanation:
PLEASE HELPPPP ILL DO ANYTHING
Answer:
slope: 2/5
y intercept: 4
Step-by-step explanation:
Miguel rented a truck for one day. There was a base fee of $20.95, and there was an additional charge of 83 cents for each mile driven. Miguel had to pay $231.77 when he returned the truck. For how many miles did he drive the truck?
Answer:
254 miles
Step-by-step explanation:
7x1027
Scientific Notation
