Answer:
Option A. 0.6 is the right answer.
Step-by-step explanation:
Given information is:
Mean = $240
SD = $60
The probability of Dan making less than $255 has to be found.
Let x = 255
First of all, we will find the z-score of the given value
[tex]z = \frac{x-mean}{SD}\\z = \frac{255-240}{60}\\z = \frac{15}{60}\\z = 0.25[/tex]
Now the z-score table will be used to see the probability of less than 0.25
Using the z-score table, we get:
P(x<0.25) = 0.5987
As the answer choices are rounded off to one decimal place, we will round off our answer to one digit after the decimal point
0.5987 => 0.6
Hence,
Option A. 0.6 is the right answer.
The diagram below shows the start and finish diagrams of a construction using a compass and straightedge.
Start
Finish
G
Which of the following statements are true about this construction? Select all that apply.
G
O
O
O
O
O
The construction is of a line perpendicular to FG from a point not on FG
The first step of the construction is to draw a circle with center X.
The first step of the construction is to draw the perpendicular bisector of wY
The second step of the construction is to draw the perpendicular bisector of FG.
The second step of the construction is to draw the perpendicular bisector of VwY.q
Answer:
Choices 1, 2, 4
Step-by-step explanation:
i took the test
Solve the formula Ax+By = C for A.
O A A+
+ By
O B. A=C-BY
x
O C. A = C+By
O D. A = C-BY
X
Answer:
[tex]A = \frac{C - By}{x}[/tex]
Step-by-step explanation:
Given
[tex]Ax + By = C[/tex]
Required
Solve for A
The question implies that we make A the subject of the formula.
Start by subtracting By from both sides of the equation by x
[tex]Ax + By - By= C - By[/tex]
[tex]Ax = C - By[/tex]
Divide both sides by x
[tex]\frac{Ax}{x} = \frac{C - By}{x}[/tex]
[tex]A = \frac{C - By}{x}[/tex]
Solved
I tried to answer this one and got it wrong the question is “find the measure of each angle indicates”
Answer:
48
Step-by-step explanation:
Hi!
Remember, the sum of the angles on a straight angle is 180 degrees. Additionally, the sum of the measures of a triangle are 180 degrees.
Now, let's label the angles of the given triangle.
<DCE = y and <CDE=x
x+y+92=180
x+y= 88
Now, y+140 = 180 --> y= 40
x+40 = 88
x=48
The answer is 48 degrees.
Hope this is correct! Have a good day!
20% tip of the cost of a d dollar dinner
Answer: 0.2d
Step-by-step explanation: For calculating the 20% tip of the cost in dollars of a dinner, simply multiply 0.2 by the cost of dollars of a dinner. 0.2 represents 20% and by using the variable "d" to represent the cost of the dinner, you can write this equation: 0.2d.
The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 20 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 20 golfers play a round of golf on his friend's course and records their scores again. The average difference in the scores (treated as the scores on his course - the scores on his friend's course) is 8.9 and the standard deviation of the differences are 11.986. Calculate a 99% confidence interval to estimate the average difference in scores between the two courses.
Answer:
(1.985, 15.815)
Step-by-step explanation:
Given that:
Sample size (n) = 20
Standard deviation (s) = 11.986
Mean (m) = 8.9
α = 99%
Using the relation :
Confidence Interval = Mean ± Error
Where ;
Error = Zcritical * standard deviation / sqrt(n)
Zcritical at 99% = 2.58
Hence,
Error = 2.58 * (11.986/sqrt(20))
Error = 2.58 * 2.6801510
Error = 6.91478958
Hence,
Lower boundary = 8.9 - 6.91478958 = 1.98521042
Upper boundary = 8.9 + 6.91478958 = 15.81478958
(1.985, 15.815)
(15×4)÷6[{32÷4(7×2-15+5)}+4
6/8 = x/12. Pls help I’m failing math
Answer:
x=9
Step-by-step explanation:
Answer:
x = 9
Step-by-step explanation:
you want to get x alone and so you need to do the opposite of dividing which is multiplying, so you multiply each side by 12.
6/ 8 = x / 12
* 12 *12
6*12/ 8 = x [tex]\frac{6*12}{8}[/tex]
72/8=x [tex]\frac{72}{8}[/tex]
9=x
Hope this helped!
what is 9/4-2(4x+4/3)+5/2x?
9514 1404 393
Answer:
-11/2x -5/12
Step-by-step explanation:
Eliminate parentheses and collect terms.
9/4 -2(4x +4/3) +5/2x . . . . given
= 9/4 -8x -8/3 +5/2x
= (-16/2 +5/2)x +27/12 -32/12 . . . . use common denominators
= -11/2x -5/12
IS THIS CORRECT IF NOT LET ME KNOW PLEASE I NEED THIS!!!
Answer:I believe it is at least that is what I would
Step-by-step explanation:
Simplify the following expression.
?
9t2 + 7t + 4 - 2t2 + 5t
Answer:
I'm assuming the 2 after 9t and -2t means squared.
7t² + 12t + 4
Step-by-step explanation:
To simplify the expression we should combine like terms. Like terms are terms with same variables and powers.
Let's start with 9t² and -2t² since they have the same variable and power of t². To combine them we should add them together which would be: 9t² + (-2t²) = 9t² - 2t² = 7t²
Next we can combine 7t and 5t since they have the same variable and power of t. 7t + 5t = 12t
4 doesn't have any like terms so we leave it as it is.
Lastly we add all of our terms: 7t² + 12t + 4
Jeremy can row 3/8 of a mile in 1/4 of an hour.
What is the unit rate that describes the miles
per hour?
Answer:
3/2 mph
Step-by-step explanation:
[tex]\frac{3}{8}[/tex] = [tex]\frac{r}{4}[/tex]
cross-multiply: 8r = 12
r = 12/8 or 1.5 mph
what is the solution to 13 x is greater than -5
Answer:
x> -5/13
Step-by-step explanation
PLEASE HELP ASAP WILL GIVE BRAINLEIST
y=9
x=12
hope its right pls do mark me the brainleist
The pencils produced by the machine are unsharpened, so two employees in the factory need to sharpen each pencil by hand. Employee A can sharpen 8 pencils per minute and Employee B can sharpen 5 pencils per minute. Employee A breaks 10% of the pencils they sharpen and Employee B breaks 15% of the pencils they sharpen. What is the probability that a broken pencil was broken by Employee A
Answer:
0.4156
Step-by-step explanation:
Given that:
Employer A:
8 pencils per minute
Probability of breaking a pencil = p(A) = 10%
Employer B:
5 pencils per minute
Probability of breaking a pencil = p(B) = 15%
Hence,
Probability of breaking a pencil:
P(breaking a pencil) = (P(A breaks pencil) * P(A)) + (p(B breaks pencil) * p(B))
P(A breaks pencil) = 0.1 * 8 = 0.8
P(B breaks pencil) = 0.15 * 5 = 0.75
P(breaking a pencil) = (0.8 * 0.1) + (0.75 * 0.15) = 0.1925
Hence, probability that a broken pencil was broken by employer A will be :
(P(A breaks pencil) * P(A)) / probability of breaking a pencil
= (0.8 * 0.1) / 0.1925
= 0.08 / 0.1925
= 0.4155844
= 0.4156
Paul paid $7 per hour to rent a bicycle. Wilson paid $9 per hour to rent a bicycle. If they both rent bicycles for 3 hours, how much MORE will Wilson pay?
Answer:
6
Step-by-step explanation:
The difference in cost / hour = 9 - 7
9 - 7 = 2
They both take the bikes for 3 hours.
Difference * time = 2 * 3 = 6 dollars
Wilson pays 6 dollars more.
Answer:
,$48
Step-by-step explanation:
7×3=21
9×3=27
27-21=6
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B
Step-by-step explanation:
By multiplying all x values by a -, you are reflecting across the y axis
give thanks by clicking heart :)
who can help me solve this problem?
Answer:
30, 28, 34, -6, 44
Step-by-step explanation:
18. The sum of 'l6, /3, and 'Is is
OA. 12, or'/3-
B. "12.
c.1/12, or 1'/12-
OD./72, or'/36-
Answer:
wn work
Step-by-step explanation:
NEED HELP WITH LAST QUESTION 2). IM IN ZOOM PLEASE HELP <3 WILL GIFT 421 POINTS
Answer:
Equation: x° + x° + (x + 10)° + 59° = 360°
Solution: x = 97
Step-by-step explanation:
The sum of the interior angles of a quadrilateral = 360°
Therefore:
x° + x° + (x + 10)° + 59° = 360°
Solve for x
x + x + x + 10 + 59 = 360
Add like terms
3x + 69 = 360
Subtract 69 from each side
3x = 360 - 69
3x = 291
Divide both sides by 3
x = 97
guys help I am stuck on this question I have to send my winter holiday
48 girls and 64 boys belong to the Twelve Mile Coulee School choir. The choir teacher plans to arrange the students into equal rows (the same number of students in each row). Only girls or boys will be in each row. What is the greatest number of students that could be in each row?
Answer:
16
Step-by-step explanation:
To find the greatest number of students that could be in each row, we need to find their greatest common factor. We can list out their prime factors first.
48: 2 × 2 × 2 × 2 × 3
64: 2 × 2 × 2 × 2 × 2 × 2
Here, their common prime factors are 2 × 2 × 2 × 2 which is 16. Thus, the greatest number of students that could be in each row is 16.
No. of rows in the girls = 48 ÷ 16
= 3
No. of rows in the boys = 64 ÷ 16
= 4
Answer:
Step-by-step explanation:
I believe for this question you need to find the HCF (or GCF you may say) of 48 and 64
HCF - Highest Common Factor
GCF - Greatest common Factor
First, prime factorize 48 and 64 (write them in the product of their prime numbers)
64 = 2 × 2 × 2 × 2 × 2 × 2
48 = 2 × 2 × 2 × 2 × 3
Choose common prime factors (all of them that are common)
on observation, there is 2 × 2 × 2 × 2 common between both of them
which is 16.
So 16 maximum people in each row
Also additional thing, it's fine if some questions were wrong, try and attempt it yourself first before asking it from someone. Getting used to ask someone is going to be troublesome in the long run. If you get stuck, then get help from your teachers (unless the teacher is unco-operative) in which case, seek help from your friends, or talk to your parents about it if you freely share stuff with them.
But anyway, hope that helps ^
Why do people say that black ops 2 is the best? I will give brainlest
Answer:
They say it because the wanna be different from others lol
Please give me brainliest
Step-by-step explanation:
Answer:
people say that black ops 2 is the best because of the replayabilty and its story line not so much zombies tho
HELP ME PLS AKANKANWKWN
Answer:
The answer is C, the third one.
1 hundred 8 million 4 hundred 4 thousand translate
Answer:
800,004,500
Step-by-step explanation:
Alexandra has 4 bags of beads. Some of the bags contain 3 purple beads and the rest contain 6 indigo beads. If Alexandra has 21 beads in all, how many bags of each color bead does Alexandra have?
Please help me fast !!
Answer:
1 bag of 3 purple beads and 3 bags of 6 indigo beads
Step-by-step explanation:
3 + 18 = 21
help??
Anyone??
need it asap
8th grade math
Answer:
8
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightStep-by-step explanation:
Step 1: Define
(m - 8)² × n
m = 10
n = 2
Step 2: Evaluate
Substitute: (10 - 8)² × 2(Parenthesis) Subtract: 2² × 2Exponents: 4 × 2Multiply: 8Answer:
8 is the answer
Step-by-step explanation:
cause (10-8)=2 then 2x2=4 then 4x2=8
sorry if i did ths wrong i am only in 7th grade
Explain how you know that segment de is not parallel to segment bc
Line segments DE and BC are not parallel because they divide the opposite side of the triangle at different ratios.
What is a triangle?A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.
Given, Line segment AD is 4 units and line segment DB is 2 units.
∴ Line segment AD is (4/2) = 2 times greater.
On the other hand line segment, AE is 9 units and line segment EC is 5 units.
∴ Line segment AE is (9/5) = 1.8 times greater.
Line segments BC and DE should have been parallel if they had the same ratios.
learn more about triangles here :
https://brainly.com/question/2773823
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The Ulis family spends $1,632 a year for gym memberships. How much does the family spend in 4 years?
Enter your answer in the box.
Help me please.
Which situation can be represented by the expression -2+(-1)
Choose 1 Answer:
Answer:
A
Step-by-step explanation:
I checked on khan
Dec 23, 8:45:08 PM
Find three consecutive POSITIVE ODD integers such that when you multiply the first
and third the result is nine less than six times the second integer.
Answer:
3, 5, 7
Step-by-step explanation:
Let the first of the three positive consecutive odd numbers be [tex]x[/tex].
Now, the second odd number = [tex]x+2\\[/tex]
And, the third odd number = [tex]x+4[/tex]
As per question statement, the multiplication of the first and third odd number is 9 lesser than the 6 times the second integer.
Writing the equation, we get:
[tex]x(x+4) = 6(x+2)-9\\\Rightarrow x^{2} +4x=6x+12-9\\\Rightarrow x^{2} +4x-6x = 3\\\Rightarrow x^{2} -2x - 3=0\\\text{Solving the above equation by factorization method:}\\\Rightarrow x^{2} -3x +x - 3=0\\\Rightarrow x(x -3) + 1(x - 3)=0\\\Rightarrow (x -3) (x+ 1)=0\\\Rightarrow x =3, -1[/tex]
As, we got a quadratic equation, so we have two solutions here.
One is positive integer and other one is negative.
So, solution is [tex]x=3[/tex]
First number is 3.
Second number is 3 + 2 = 5
Third number is 5 + 2 = 7
What is the rate change of the linear function that has a graph that passes through the points (2,9) (-1,3)
The linear function is y = 3x + 6. Then the rate of change of the linear function will be 3.
What is differentiation?The rate of change of a function with respect to the variable is called differentiation. It can be increasing or decreasing.
The linear equation that is passing through the points (2,9) and (-1,3).
Then we have
y - 3 = [(3 - 9)(-1 - 2)] (x + 1)
y - 3 = (-6) / (-2) (x + 1)
y - 3 = 3x + 3
y = 3x + 6
Then the rate of change of the linear function will be
y' = 3
More about the differentiation link is given below.
https://brainly.com/question/24062595
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