Answer:824
Step-by-step explanation:
Answer:824
Step-by-step explanation:
-(x + 2y + 3) - 3x + y
X = 4 and y = -2
Answer:
-17
Step-by-step explanation:
-(4+2(-2) +3) -3(4) -2
-(4-4+3)-3(4)-2
-3-3(4)-2
-3-12-2
-17
if the sales are $680 and the commission rate is 9% what is the commission
Answer:
61.2
Step-by-step explanation:
In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide standardized test for the students in his class. Instead of looking at the scores relative to the norms in the state, the teacher wants to understand the scores relative to the students who will be in the class. To do so, he decides to convert the test scores into z scores relative to the mean and standard deviation of the students in the class. The mean test score in his upcoming class is 49, and the standard deviation is 20.7.
The following are the scores for some (not all) of her students.
Student Test Score Z- score
A 205 0.08
B 199 ______
C 266 1.68
D 222 ______
E 188 -0.37
F 172 ______
G 184 -0.47
H 215 ______
The teacher wants to identify those students who may need extra challenge or extra help. As a first cut, she decides to look at students who have z-scores above z = 2.00 or below z = -2.00. Identify the test score corresponding to each of the following z-scores.
For z = 2.00, test score = ____________
For z - -2.00, test score = ____________
Answer:
The answer is below
Step-by-step explanation:
In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide standardized test for the students in her class. Instead of looking at the scores relative to the norms in the state, the teacher wants to understand the scores relative to the students who will be in the class. To do so, she decides to convert the test scores into z-scores relative to the mean and standard deviation of the students in the class. The mean test score in her upcoming class is 202, and the standard deviation is 38.2. The following are the scores for some (not all) of her students. Complete the table using the dropdown menus. The teacher wants to identify those students who may need extra challenge or extra help. As a first cut, she decides to look at students who have z-scores above z = 2.00 or below z = -2.00. Identify the test score corresponding to each of the following z-scores. Round to the nearest whole number. For z = 2.00, test score = .For z - -2.00, test score = .
Solution:
The z score is a used in statistics to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:
[tex]z=\frac{x-\mu}{\sigma}\\\\where\ x=raw\ score, \mu=mean,\sigma=standard\ deviation\\\\For\ a\ sample\ size(n):\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }[/tex]
Given that μ = 202, σ = 38.2
i) for student B, x = 199. Hence:
[tex]z=\frac{x-\mu}{\sigma} =\frac{199-202}{38.2}=-0.08\\[/tex]
ii) for student D, x = 222. Hence:
[tex]z=\frac{x-\mu}{\sigma} =\frac{222-202}{38.2}=-0.52\\[/tex]
iii) for student F, x = 172. Hence:
[tex]z=\frac{x-\mu}{\sigma} =\frac{172-202}{38.2}=-0.79\\[/tex]
iv) for student H, x = 215. Hence:
[tex]z=\frac{x-\mu}{\sigma} =\frac{215-202}{38.2}=0.34\\[/tex]
For z = 2.00, the test score x is:
[tex]z=\frac{x-\mu}{\sigma}\\\\ 2=\frac{x-202}{38.2}\\\\76.4=x-202\\\\x=278.4[/tex]
For z = -2.00, the test score x is:
[tex]z=\frac{x-\mu}{\sigma}\\\\ -2=\frac{x-202}{38.2}\\\\-76.4=x-202\\\\x=125.6[/tex]
1 = w/10 what is up plz help
Answer:
I think it would be W=1
Step-by-step explanation:
Hope this helps :-)
Need the correct answer please asap
Answer:
B. 288 In
Step-by-step explanation:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
x*(x-2)-(288)=0
x • (x - 2) - 288 = 0
Find two factors of -288 whose sum equals the coefficient of the middle term, which is -2 .
-288 + 1 = -287
-144 + 2 = -142
-96 + 3 = -93
-72 + 4 = -68
-48 + 6 = -42
-36 + 8 = -28
-32 + 9 = -23
-24 + 12 = -12
-18 + 16 = -2 That's it
Answer: 288
Help me quick gotta get a 100% before 12
Answer:
A,
B
Step-by-step explanation:
If it's a 15 dollar variable fee and a flat 10 our equation looks like this
15c+10
which is the same as A
Now that we know the equation we can just plug a couple of numbers in
when c=3 what is h
15(3)+10=
55
THerefore the answer is B
Answer:
13) A
14) B
Step-by-step explanation:
For number 13 the answer is A because it says he gets charged 15 dollars per hours PLUS the 10 doller traveling fee. So basically: 15 charge + 10 travel fee = hour.
Now for number 14 we know the answer just from the first part. If its three hours then we need to multiply 15 dollars by 3 because like they said, he charges 15 dollars PER HOUR. 15 times 3 equals 45. But thats not all. We need to add 10 dollars to that because of the travel fee. 45 plus 10 equals 55. And the only table that shows 55 dollars is B so we already know the answer without doing the rest.
If x = 8 units, y = 3 units, and h = 9 units, find the area of the trapezoid shown above using decomposition.
A.
72 square units
B.
85.5 square units
C.
99 square units
D.
126 square units
Answer:
72
Step-by-step explanation:
because you do 8x9 and its 72
Answer:
72
Step-by-step explanation:
hope it helps
Find an equivalent ratio in simplest terms:
44 : 33
Answer:
4 : 3
Step-by-step explanation:
ur welcome
Joann can run the first 50 meters of the 200-meter race in 6.3 seconds. If she can maintain the same speed for the whole rece, how many seconds will it take for Joann to finish the race?
Answer:
Step-by-step explanation:
shes fastr
-8 = 2y – 2
answer please
Answer:
y = -3
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityStep-by-step explanation:
Step 1: Define
-8 = 2y - 2
Step 2: Solve for y
[Addition Property of Equality] Add 2 on both sides: -6 = 2y[Division Property of Equality] Divide 2 on both sides: -3 = yRewrite/Rearrange: y = -3Step 3: Check
Plug in y into the original equation to verify it's a solution.
Substitute in y: -8 = 2(-3) - 2Multiply: -8 = -6 - 2Subtract: -8 = -8Here we see that -8 does indeed equal -8.
∴ y = -3 is the solution to the equation.
Write the rate as a fraction in simplest form.
6 shrubs every 24 feet
Answer:
1/4
Step-by-step explanation:
6/24 simplifies to 1/4. 1 shrub every 4 feet.
1. Solve for x in the following problem. You MUST show the equation you set up to solve and the associated work to get to the final answer.
Answer:
x = 5
Step-by-step explanation:
if the lines are parallel, the triangles are similar and thus proportional
set up a proportion:
22/8 = (6x+3)/12
8(6x+3) = (22)(12)
48x + 24 = 264
48x = 240
x = 5
Why does paying off the highest interest rate credit card first make the most mathematical sense?
Answer:
Paying off the highest interest rate credit card first makes the most mathematical sense because it will save you more money and allow you to redirect funds to other financial goals faster. Paying off the highest interest rate first is better because this way you get to avoid financial problems and avoid having to pay too much money of interest since the card with the highest interest rate is usually the one that will cause you the most financial pain.
can someone pls tell me how to get the answer?
the value of a certain car after r years is modeled by the expression 150000.7t. What are the initial cost, I, and the rate of deprecation, r, of this car?
Answer:
74037.7t
Step-by-step explanation:
u +7 at u=9
Help!!!!
Answer:
u = 0
Step-by-step explanation:
hedh djsf
fjdg
ggf
Help please and thanks
are these graphs rational or irrational?
Answer:
rational
Step-by-step explanation:
According to the National Education Association (NEA), teachers generally spend more than 40 hours each week working on instructional duties. The following data show the number of hours worked per week for a sample of 13 high school science teachers and a sample of 11 high school English teachers. High school science teachers55585252565948635252505256 High school English teachers5046484847475044574345 (a)What is the median number of hours worked per week for the sample of 13 high school science teachers
Answer:
The median number of hours worked per week for the sample of 13 high school science teachers is 52.
Step-by-step explanation:
Median of a data set:
The median of a data set is the element that separates the lower 50% of the set from the upper 50%.
If the cardinality n of the set is odd, the median is the element at the position (n+1)/2 of the sorted sed.
If the cardinality n of the set is even, the median is the mean between the elements at the position n/2 and (n/2)+1 of the sorted sed.
In this question:
Hours worked for the sample of 13 high school science teachers:
55, 58, 52, 52, 56, 59, 48, 63, 52, 52, 50, 52, 56
Sorting in an ascending way:
48, 50, 52, 52, 52, 52, 52, 55, 56, 56, 58, 59, 63
Cardinality of 13, so odd, the median is the element at the 13+1/2 = 7th position of the sorted set, which is 52.
The median number of hours worked per week for the sample of 13 high school science teachers is 52.
what is 1,256 rounded to the nearest hundredth
Answer:
1,300
Step-by-step explanation:
1256, if something is more than 5 then it goes up but if it's 4 or lower it goes down so 1256 rounded up to the nearest hundredth is 1300.
Answer: 1300
1256, if something is more than 5 then it goes up but if it's 4 or lower it goes down so 1256 rounded up to the nearest hundredth is 1300
Step-by-step explanation:
Digital Lesson
Sam does 11 jumping jacks in 8 seconds. If he does the jumping jacks at a constant rate, how many
jumping jacks can he do in 20 seconds?
Answer:
about 28
Step-by-step explanation:
SOMEONE HELP I NEED TO PASS
What this will look like on STAAR
Example 4: A wheel has a diameter of 10 millimeters,
Circle the answer
with shapes tool
C=
Now that we have estimated,
we can look for which is closest
Which measurement is closest to the circumference of the
circle in millimeters?
A, 15.71 mm
B. 31.42 mm
C. 62.83 mm
Answer:
Could you send a picture of the work please!
Step-by-step explanation:
If a tree cast shadow that is 42 feet long and a man whose height is 6 feet cast a shadow that is 5 feet long how tall is the tree ?
5 (15pts, 5pts each) In △ABC below, ED = 6 cm, EC = CB, and AC ⊥ BE . If AC = 12 cm and AB = 13 cm:
Answer:
i dont even understand this can u pls place an attachment of the problem pls
SCALE FACTORE, EASY JUST CONFUSED
Answer:
A. 1/5
Step-by-step explanation:
To find scale factor, simply find the length of one side on the copy and divide by the length of the corresponding side on the original.
For instance, the top side of the copy is 1 unit long, and the top side of the original is 5 units long. So, take 1 divided by 5 to get a scale factor of 1/5.
Can you please help me thanks
Answer:
A IS YOUR CORRECT ANSWERStep-by-step explanation:
A representation shows a proportional relationship between
[tex]x \: and \: y[/tex]
HOPE THIS HELPS YOU
Follw me = 10 thanks
Mark as brainliest = 10 thanks
1 thanks to me = 2 thanks
The bar diagram represents 12 months in a year. If u slept 33% of the year how many months are spent sleeping? Represent your answer using the bar diagram.
Answer:
Rounded to whole numbers, if he slept for 33% of the year, he slept for a total of 4 months.
Step-by-step explanation:
Given that in a year there are a total of twelve months, if he slept for 33% of the year, to determine how many months are spent sleeping the following calculation must be performed:
12 - (12 x 33/100) = X
12 - (12 x 0.33) = X
12 - 3.96 = X
8.04 = X
12 - 8.04 = 3.96
Thus, rounded to whole numbers, if he slept for 33% of the year, he slept for a total of 4 months.
Please help I do anything just help
The table shows the amounts of tomato sauce and cheese used to make the last 4 orders at Sara’s Pizza
b. Sara’s Pizza recorded weekly sales for regular cheese pizza from the past four weeks.
Week 1: 417 pizzas sold
Week 2: 399 pizzas sold
Week 3 : 405 pizzas sold
Week 4: 410 pizzas sold
Estimate how much tomato sauce and cheese they should purchase for next week. Explain how you made your estimate and why it is reasonable.
Answer:
week 4
Step-by-step explanation:
that is answer
1) What number comes after 234 base 5. Explain
2)What number comes before 210 base 5. Explain
9514 1404 393
Answer:
1) 240
2) 211
Step-by-step explanation:
The counting sequence in base 5 is similar to that in base 10, except the digits 5 through 9 are not used. The first few counting numbers are ...
1, 2, 3, 4, 10, 11, 12, 13, 14, 20, 21, 22, ...
When 1 is added to 4 in the units place, a carry to the fives place is generated and the units digit is returned to zero.
234₅ +1 = 240₅
210₅ +1 = 211₅