Answer:
60
Step-by-step explanation:
write 120 like this: 120/2
Then just multiply the numerators.
Which gets you 120/2.
Then change it it to a mixed fraction which is 60.
WILL GIVE BRAINLEST, What is the height of the trapezoid if the Area = 77 ft²?
Answer:
h = 7.333
Step-by-step explanation:
Answer: 7
Step-by-step explanation: I'm not sure about the actual mathematical explanation but I just took the quiz and I'm in the review right now :D
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
A jar contains 200 coins.
Zack pulls out a coin, records its value, and then puts the coin back into the jar.
Zack does this same process 8 times and records 1 quarter, 2 dimes, 2 nickels, and 3 pennies.
Based on these results, how many coins in the jar can Zach expect to have a value of $0.10 or more?
Answer:
10% ive done these in 6th
Step-by-step explanation:
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 someone pls tell me how to get the answer?
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.
Add 4/5 + 1/4 visually!
Answer:
1 and 1/20
Step-by-step explanation:
LCM of 5 and 4 = 20
4/5 = 16/20
1/4 = 5/20
SOMEONE HELP I NEED TO PASS
The most common IQ tests have a standardized mean of 100 and a standard deviation of 15. Based on this information, use the empirical rule to answer the following question: If approximately 348 prospective college students are tested for their IQ, approximately what percentage of their scores will fall within one standard deviation of the mean
Answer:
Approximately 68% of their scores will fall within one standard deviation of the mean.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
By the Empirical Rule, approximately 68% of their scores will fall within one standard deviation of the mean.
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
CAN SOMEONE HELP PLEASEEE
Answer:
1
Step-by-step explanation:
anything to power of 0 is 1
Answer:
1
Step-by-step explanation:
by the laws of exponents, any base with a power to 0 is equal to 1
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]
Suppose that A and B are two events in a sample space, S, which are independent and which have equal probability, p, of occurring. Suppose further that the probability that neither A nor B occurs is 0.81. Find the probability that both A and B occur.
Answer:
The probability that both A and B occur is P = 0.01
Step-by-step explanation:
Both events A and B have a probability p of occurring.
Then both events A and B have a probability (1 - p) of NOT occurring.
The probability that neither A or B occurs is equal to the product of the individual probabilities, and this is equal to 0.81, then:
(1 - p)*(1 - p) = 0.81
1 - 2*p + p^2 = 0.81
p^2 - 2*p + 0.19 = 0
We can solve this if we use Bhaskara's equation, the two solutions are:
[tex]p = \frac{-(-2) +- \sqrt{(-2)^2 - 4*1*0.19} }{2*1} = \frac{2 + - 1.8}{2}[/tex]
Then the two solutions are:
p = (2 + 1.8)/2 = 3.8/2 = 1.9
A probability must be a number between zero and one, and this is larger than one, so this solution can be discarded.
the other solution is:
p = (2 - 1.8)/2 = 0.2/2 = 0.1
This means that the probability that event A occurs is p = 0.1
And the probability that event B occurs is p = 0.1
The probability that both events occur is equal to the product of the individual probabilities, which is:
P = 0.1*0.1 = 0.01
The probability that Chloe acts hungry at 7pm given that she has already eaten dinner is 0.5. The probability that Chloe acts hungry at 7pm given that she has not had dinner is 0.99. Assume that there is probability 0.9 that Chloe has eaten dinner by 7pm on a given day. a) (1 pt) If Chloe is acting hungry at 7pm, find the probability that she has not had dinner yet. b) (1 pt) If Chloe is not acting hungry at 7pm, find the probability that she has already had dinner.
Answer:
a) P( [tex]Y^{C}[/tex] | X ) = 0.180
b) P(Y | [tex]X^{C}[/tex] ) = 0.998
Step-by-step explanation:
Let
P(X) - Probability that he acts hungry
P(Y) - Probability that he had ate dinner,
Given,
P(X | Y) = 0.5
P(X | [tex]Y^{C}[/tex] ) = 0.99
P(Y) = 0.9
a.)
P( [tex]Y^{C}[/tex] | X ) = [tex]\frac{P( X | Y^{C} ). P(Y^{C} ) }{P( X | Y^{C} ). P(Y^{C} ) + P( X | Y ) . P (Y) }[/tex]
= [tex]\frac{(0.99)(0.1)}{(0.99)(0.1) + (0.5)(0.9)} = \frac{0.099}{0.549}[/tex] = 0.180
⇒P( [tex]Y^{C}[/tex] | X ) = 0.180
b.)
P(Y | [tex]X^{C}[/tex] ) = [tex]\frac{(1 - P(X | Y ) ) . P(Y)}{P( X^{C} ) } = \frac{(1 - P(X | Y ) ) . P(Y)}{ 1 - P( X ) }[/tex]
= [tex]\frac{(1 - 0.5)(0.9)}{1 - [(0.99)(0.1) + (0.5)(0.9) ]} = \frac{(0.5)(0.9)}{1 - [(0.099) + (0.45) ]} = \frac{0.45}{1 - [0.540]} = \frac{0.45}{0.451}[/tex] = 0.998
⇒P(Y | [tex]X^{C}[/tex] ) = 0.998
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.
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
Write 4/10 as a product of a whole number and a unit fraction
Answer:
4 times 1 over 10
Step-by-step explanation:
i think it is this hope it is right
Answer:
Step-by-step explanation:
it would be 4 times 1 over 10
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
60 61 62 63 64 65 66 67 68 69 70
Find the mean of the data shown in the dot plot above. Round your
answer to the nearest tenth.
Answer:
the mean is 65
Step-by-step explanation:
if the sales are $680 and the commission rate is 9% what is the commission
Answer:
61.2
Step-by-step explanation:
chase is comparing music subscription price . a 12 month with all ears cost $91.80 and a subscription with press play cost $19.35 which service cost less per month ?
Answer:
its press play
Step-by-step explanation:
Press Play Step-by-step explanation:
1 year 91 dollars or three month 13 dollars so press play would end up at 52 a year and all ears ends up at 91 a year
what is the value of x in the triangle
Answer:
C
Step-by-step explanation:
Please help quick!
8 + 3x = −13
Answer:
x=-7
Step-by-step explanation:
Answer:
x=7
Step-by-step explanation:
Simplifying
-1(8 + -3x) = 13
(8 * -1 + -3x * -1) = 13
(-8 + 3x) = 13
Solving
-8 + 3x = 13
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 3x = 13 + 8
Combine like terms: -8 + 8 = 0
0 + 3x = 13 + 8
3x = 13 + 8
Combine like terms: 13 + 8 = 21
3x = 21
Divide each side by '3'.
x = 7
Simplifying
x = 7
Help I'll mark brainliest
Answer:
J
Step-by-step explanation:
Acute angles are less than 90 degrees.
Obtuse angles are more than 90 degrees.
So J is the only polygon that has angles less than 90 degrees and angles more than 90 degrees.
ms adams shares out 40 pencils between niamh and jack in the ratio 3:5 how many pencils does each child get
Answer:
niamh gets 15 pencils and jack gets 25 pencils
Step-by-step explanation:
3+5=8
40/8=5
5*3=15
5*5=25
so the ratio for how many penicils each child is 15:25
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
3/8x5/4 Helpppppp pls
Answer:
9/25 or .36
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
What is the area of ACDE to the nearest whole number?
A) 87 cm
B) 105 cm
C)123 cm
D) 210 cm
Thanks!
Answer: its A
Step-by-step explanation:
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.