Answers
Answer:
z=42
Step-by-step explanation:
-7=z/-6
The way I learned in school, is the 'butterfly method'. First, you make -7, -7/1 (same number, just different way of writing it). Then put it side by side with z/-6.
-7/1=z/-6 . I know, i know it looks scary here, but write it in the regular division format with -7 above 1 as z is above -6 in the photo, and it looks easier. Then we will 'butterfly' multiply! This just means we multiply diagonally. For example, if -7 is the numerator on the left side, and -6 is the denominator on the right side, they will be multiplied together. -7 multiplied by -6 is 42. Remember the negative cancels out if it is multiplied by another negative!!!
Then we 'butterfly' multiply again, this time with the 1 as the denominator on the left side and the z as the numerator on the right side. 1 multiplied by z is, well, z!
So then we get 42=z.
May be a bit confusing, but if you write it down, I promise it's quite simple! Hope this helps! :)
Related Questions
2, 3, 5, 9, 17, 22, 31, 39
Regina kept track of the points she scored during her team’s first eight basketball games. What is Regina’s mean score?
Responses
A 3939
B 1616
C 3737
D 1313
E 17
Answers
Answer:
Mean = 16
Step-by-step explanation:
MEAN can be find bg the sum of all score divided by the amount of the score.
Mean = total amount / number of amount
Total amount = 2 + 3 + 5 + 9 + 17+ 22 + 31 + 39
= 128
number of amount = 2, 3, 5, 9, 17, 22, 31, 39
= 8
Then we can calculate mean as
Mean = 128/8
Mean = 16
2+3+5+9+17+22+31+39=128
128/8=16
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Answers
For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).
Range: The range is the difference between the largest and smallest values in the dataset.
For Mountain View School:
Range: 9 - 0 = 9
For Seaside School:
Range: 9 - 0 = 9
Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.
For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4
For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5
To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.
Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice
For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.
For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.
Part B:
For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.
For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.
Part C:
If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.
How do you find the equation of a line passing through the points (2,-4) and (-6,-2)?
Answers
Answer:
hoi zäme ich habe die Mail von gestern Abend
Which letters have line symmetry choose our answers that are correct
Answers
Answer:
Letters O and E have lines of symmetry ! Vertically & horizontally
2 (235*4532)53 +35 *pi 347*x
PLSS HELPP ME
Answers
112892120 + 12145
I'm not sure if u were supposed to write smt between pi and 347 but this is the answer I've got
Liz's age is two-thirds of Debbie's age. Debbie's age is half of Freya's age. what is the ratio of Liz's age to Freya's age?
Answers
Answer:
Let's start by using variables to represent the ages of the three people:
Let L be Liz's age.
Let D be Debbie's age.
Let F be Freya's age.
From the problem, we know that Liz's age is two-thirds of Debbie's age, so we can write:
L = (2/3)D
We also know that Debbie's age is half of Freya's age, so we can write:
D = (1/2)F
To find the ratio of Liz's age to Freya's age, we need to express Liz's age and Freya's age in terms of a common variable. Since we have an equation relating Debbie's age to Freya's age, we can use that as the common variable. From the equation D = (1/2)F, we can solve for F in terms of D:
F = 2D
Now we can substitute this expression for F into the equation for Liz's age:
L = (2/3)D = (2/3)(1/2)F = (1/3)F
So Liz's age is one-third of Freya's age. The ratio of Liz's age to Freya's age is therefore 1:3.
Using a directrix of y = −2 and a focus of (2, 6), what quadratic function is created?
here are the answers given
\/
f(x) = −one eighth (x − 2)2 − 2
f(x) = one sixteenth (x − 2)2 + 2
f(x) = one eighth (x − 2)2 − 2
f(x) = −one sixteenth (x + 2)2 − 2
Answers
Answer:
f(x)=1/16(x-2)^2+2
Step-by-step explanation:
The Equation can be written like this:
f(x) = 1/(4p)(x -h)^2 +(k-p)
where (h, k) is the focus, and p is half the distance between focus and directrix. Here, (h, k) = (2, 6) and p=(6-(-2))/2 = 4. So the equation is ...
f(x) = 1/16(x -2)^2 +2
Simplify (6x+5-3x+16)÷3x15÷5
Answers
Answer:
I love algebra anyways
The ans is in the picture with the steps how i got it
(hope this helps can i plz have brainlist :D hehe)
Step-by-step explanation:
Which equation has the solution x = 3? Select each correct answer. Responses 5x−7=1 5 x minus 7 equals 1 9−3x=0 9 minus 3 x equals 0 2x + 4 = 10 2, x, + 4 = 10 3x + 1 = 9 3, x, + 1 = 9 9x−1=4 9 over x end fraction minus 1 equals 4 x3+5=6 x over 3 end fraction plus 5 equals 6 (dont answer)
Answers
Answer:
Step-by-step explanat
none of them
Gabby took 8 vocabulary quizzes. Her scores were:
7 points 7 points 7 points 5 points 5 points 7 points 4 points 6 points
What was the mode of Gabby's quiz scores?
Answers
Answer:
7
Step-by-step explanation:
As we know Mode is the most frequent number in a set of data values:
As the number 7 appears 4 times more than any other number 7 is the answer.
Hope it helps!
I will give brainliest i got fish
Answers
Which measure of central tendency best describes the data?
12, 16, 17, 17, 16, 15, 20, 15, 16
A. mean only
B. either mean or median
C. median only
Answers
Answer:
If I'm not mistaken the correct answer should be B.
(-sorry if I got it Wrong-)
HELP PLEASE I REALLY NEED HELP
Answers
First step is take it out of fractions and into decimals, they are easier to work with.
(0.5x1.125)x(2.66x3.33)x7.5
Then PEMDAS
Parentheses
0.625x-0.66x7.5
Then multiply
-0.41625x7.5
Answer
-3.121875
A straight line is a function if it can be written in the form y = mx + b.
Question 1 options:
True
False
Answers
At the zoo, for every 666 adult camels, there are 555 baby camels. There are a total of 444444 adult and baby camels at the zoo.
Complete the table.
Original ratio Number in the zoo
Baby camels 555
Adult camels 666
Total camels
444444
Answers
Answer:
1 adult camel for every 11 baby camels, or 1:11
find n
Do 12/15 and 8/10 have the same value? Explain your answer in complete sentences.
Answers
Answer:12/15 and 8/10 do have the same value, if you were to take the two fractions and simplify them into decimals both answers would be 0.8.
Step-by-step explanation: please give brainliest.
Answer: yes they are the same
Step-by-step explanation:
The box plots shown represent the average mileage of two different types of cars. Use the box plots to compare the data sets.
Drag each value to show if it is greater for SUVs, greater for sedans, or if there is not enough information to tell.
Answers
Answer:
Step-by-step explanation:
A cereal box has a height of 32 centimeters. It has a base with an area of 160 square centimeters.
What is the volume, in cubic centimeters, of the cereal box?
4.) Kandice can read ¾ of a book in ½ an hour. What is the rate that she can read a book in terms of books per hour? ( I think it is 4 but idk)
5.) Karen can walk 2/3 of a mile in 1/5 of an hour. How long will it take her to walk 10 miles?
8) Tarra is baking muffins for a birthday party. The recipe for 12 muffins calls for 2 1/4 cups of flour and 1 ½ cups of sugar.
Part A: If Tarra uses 9 cups of flour, how many cups of sugar will she need?
Part B: If Tarra uses 9 cups of flour, how many muffins will she make?
9.)Greg can cut 2/5 of his yard in 1/3 of an hour. At this rate, how long will it take Greg to mow his entire lawn?
A. 1/3 hr
B. 6/5 hr
C. 5/6 hr
D. 3/5 hr
Answers
Answer:
4. 1 1/5
8. part A 5 1/2
part b 48
9. C
Please help! This is due in 3 minutes!
Answers
6th grade math
(–27) ÷ (–9 ÷ 1/9)
Answers
\(\displaystyle\ \boldsymbol{(-27)\div(-9\div\frac{1}{9})=-27\div(-9\cdot9)=} \\\\\boldsymbol{-27\div-81=\boxed{\frac{1}{3}} }}\)
Which scenario can be modeled by the linear function
y = -15x + 500?
A. The temperature on Jupiter is
15℉ and increases by 500℉ every day.
B. There is a population of 500 giraffes in Western Africa that decreases by 15 giraffes each year.
C. A carpet cleaning service charges $500 plus an additional $15 for every hour.
D. A membership fee for a movie streaming service is free, but each rental costs $15.
Answers
Michael and Melissa both claim to be earning a C average (70%-79%) in their Latin class. The table below shows their grades:
One of the students is wrong about their average. Which one is wrong? Use the mean and the median given to explain how they are wrong.
Answers
Answer:
Both are correct.
Step-by-step explanation:
This is most probably a trick question because when you solve the mean and median of both you can clearly see that their answers are averages are correct, even the rounding of decimals.
Answer:
Michael is wrong
Step-by-step explanation:
You want to know which student has misunderstood their grade computation, given the mean and median scores shown.
MeanThe mean of the test grades is their sum, divided by their number. The values shown for the mean grades are correct.
"Average" is another name for "mean." Thus the students' grade average will be the value of their mean grade, not their median grade.
Michael in incorrect in assuming that his median grade of 70% earns him a C in the class.
<95141404393>
"A medicine is effective for 80% of patients. The table shows 30 randomly generated numbers from 0 to 999. Use the table to estimate the probability of the event."
6. The medicine is effective on each of three patients.
7. The medicine is effective on fewer than two of the next three patients.
Answers
Answer:
1/2 & 1/10
Step-by-step explanation:
Each of three:
15 outcomes have all three digits 1 through 8
So, 15/30 which is 1/2
Fewer than 2 is one or none being effective, i.e one or no digits are 1 through 8
There are only three such outcomes
So, 3/30 = 1/10
A small kite starts at 7.3 meters off the ground and goes up at 2.5 meters per second. A large kite starts at 12.4 meters off the ground and goes up at 1.5 meters per second. When are the kites at the same height?
type your answer like this: At ____ seconds
Answers
Answer:
at 25 seconds
Step-by-step explanation:
What is 8/15 simplified?
Answers
Answer:
Nothing
Step-by-step explanation: Your answer can't be simplified. So, your answer is 8/15 because your answer can't be simplified.
1) Simplified form of expression is, 0.533
2) The solution is, 8/15
Now, We can simplify 8/15 as,
8 / 15
After divide we get;
8/15 = 0.533
And, We have to simplify the expression,
= 2/3 x 4/5
= 8 / 15
Therefore, We get;
1) Simplified form of expression is, 0.533
2) The solution is, 8/15
Learn more about the divide visit:
https://brainly.com/question/28119824
#SPJ6
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP :O Simple Algebra! I'll give BRAINLIST!!!!!!!! Pls look at the image below. Please do all. Tell me which is equivalent. TY. Quick pls
Answers
Answer:
Step-by-step explanation:
There is no picture. Can I have brainly still?
Keira said that if 6 tickets are sold, there should be 2 tickets left. Is Keira correct?
Answers
According to Keira, if 6 tickets are sold, there should be 2 tickets left. However, we don't have any information about the initial number of tickets available.
If the total number of tickets initially was 8, and 6 tickets were sold, then there would indeed be 2 tickets left, supporting Keira's statement.
However, if the total number of tickets initially was less than 8, or if the statement doesn't specify the initial number of tickets, we cannot determine if Keira's statement is correct.
Therefore, without additional information, we cannot determine the accuracy of Keira's statement.
How far did I travel to reach my destination on each day of my three-day Trip?
a. On Day 1, after traveling 5/8 of the way to the first day's destination, I still had 15 miles left to go before reaching my first destination.
b. On Day 2, after traveling 18 miles, I still had 2/5 of that day's distance left to go before reaching my second destination.
c. On Day 3, after traveling 5/11 of that day's distance, I still had 6 more miles to travel than what I had already traveled that day, before reaching my third destination.
Answers
The total distances you traveled to reach your destination on each day of your three-day trip are as follows:
a) Day 1 = 40 miles
b) Day 2 = 30 miles
c) Day 3 = 11 miles.
How the total distances are determined:The total distances are determined using proportions.
Proportion refers to the fractional value of the whole number or quantity.
a) Day 1:
The fractional distance traveled = ⁵/₈
The remaining distance to travel = 15 miles
15 miles = ³/₈ (1 - ⁵/₈)
Proportionately, the total distance = 40 miles (15 ÷ ³/₈)
b) Day 2:
The distance traveled = 18 miles
The remaining distance to travel = ²/₅
The distance traveled = ³/₅ (1 - ²/₅)
³/₅ = 18 miles
Proportionately, the total distance = 30 miles (18 ÷ ³/₅)
c) Day 3:
The distance traveled = ⁵/₁₁
The distance to travel = 6 miles
The distance to travel in fractions = ⁶/₁₁ (1 - ⁵/₁₁)
Proportionately, if 6 miles = ⁶/₁₁, the total distance = 11 miles (6 ÷ ⁶/₁₁)
Learn more about proportions at https://brainly.com/question/1496357.
#SPJ1
Answer correctly and fast please.
Answers
Answer: C
Step-by-step explanation: your fast answer is C.
Explanation: 140 divided by 2 is 70
Can someone please help me
