Find the weights of Maryellen, her brother, and her pet from the following clues: Maryellen, her brother, and her pet altogether
weigh 155 lb; the weight of her brother and her pet together,
subtracted from Maryellen's weight, is 37 lb; Maryellen and her
pet together weigh 1l2lb.

Maryellen would be 15, because if her mother is twice that plus 8 that would make her 38. Then, if Maryellen's dad is 3 years older than the mom that means he is 41. Add all the ages, 94.

Step-by-step explanation:

119.2

Step-by-step explanation:"Maryellen (nicknamed Ellie) is an enthusiastic, optimistic, ambitious, and imaginative girl. She longs to stand out but often feels lost in the shuffle of her big, busy family. (She is often annoyed by the fact that when people meet her for the first time, they ask which sister she is in order, instead of treating her uniquely.) Her favorite TV shows include Davy Crockett and The Lone Ranger, and she dreams up episodes where she gets to be the hero.Maryellen is seen as cheerful and curious by people meeting her for the first time. Maryellen had polio when she was seven years old during the Polio Epidemic of 1952. This resulted in one of her legs being weaker than the other, and she also has cold-sensitive lungs. Despite her disability, she is a fast runner and excellent swimmer, and also enjoys roller skating. She is very skinny for her age and has a nose like her sisters.

She's quite energetic, tends to take charge, and is quite the leader. Maryellen is always full of big ideas and imagination, though this often gets her into trouble. She uses most of her ideas to bring attention to herself; however, this often causes disasters wherever she goes, because she impulsively follows through with her ideas without much thought. Maryellen is often considered "wild and tomboyish" by her sisters; some of her closest friends are boys and she's always playing the same things they do. She secretly wishes people would take her ideas seriously. She really wants to impress her parents, especially her mom, and wishes she was seen as a responsible woman with great clothes, like her sisters; to her, her older sisters have much more glamorous lives than her. Maryellen is used to receiving hand-me-downs due to being in a large family, and since she has two older sisters she often ends up having to do everything after they have. She is interested in fashion and wants clothes and outfits that are "chic and grown-up looking". She is not very tidy or organized, a contrast from her two older sisters.

Though Maryellen likes to pretend she's her favorite heroes from TV, she's not as interested in heroes who use magic or super powers, since she's not able to use them in real life. Maryellen frequently compares her life to those shown on TV and expects her life to be more like those. She also likes to make up her own TV shows. She also shows interest in movies and music; her favorite actress is Debbie Reynolds. Though she often wishes to perform and be the center of attention, she has a hard time speaking in front of large groups of people and often gets stage fright.

Maryellen is a great artist--her friends compare her to Grandma Moses--and loves to draw and make gifts for her family. She's also highly interested in science, especially rocket science and medicine due to her history of having polio. Maryellen is open-minded and doesn't judge people by appearances or align with popular sentiment. Examples include continuing to be best friends with a boy even after being told that girls "don't do that" by Joan, and while many of her friends looked down on Italians (due to Italy being aligned with Germany and Japan during WWII) Maryellen befriends an Italian girl.

Her favorite subject is geography; she's interested in foreign lands, history, and languages. Her least favorite subject is handwriting because she is left-handed and so doesn't write as well, and created her own "cursive" style to suit her. Maryellen also loves to do mental math. She had been a Brownie Girl Scout prior to the series start, and has recently graduated to Girl Scouts when she entered into fourth grade. However, she has a hand me down from her sisters (like most of her clothes) and so it is the "older" version with long sleeves.

Maryellen's friends call her "the one, and only" because there's no one in the world quite like her. American Girl describes her as an inventive girl who stands out from the crowd.Family

Stan Larkin:[3] Father

Kay Larkin:[4] Mother

Joan Larkin: Oldest sister

Carolyn Larkin: Older sister

Beverly Larkin: Younger sister

Tom Larkin: brother

Mikey Larkin: Youngest brother

Grandpop: Maternal grandfather

Grandmom: Maternal grandmother

Jerry Ross: Joan's husband, Maryellen's brother-in-law

Friends and Other Characters

Davy Fenstermacher: Maryellen's best friend

Angela Terlizzi: A girl originally from Italy

Karen King: Maryellen's best friend from school

Karen Stohlman: Maryellen's best friend from school

Wayne Philpott: Davy's other best friend who follows him around everywhere

Explanation:

Interquartile range is the difference between the third and the first quartile of a data set.

It is designated by IQR = Q₃ - Q₁.

Then, you must determine first quartile, Q₁, and third quartile, Q₃.

To determine the quartiles you must order the numbers in the data set. They already are ordered.

Then, separate them in two equal parts. When the amount of data in the set is odd, the middle number is the median and it separates the data set into two equal parts:

[ 2, 5, 9, 11, 18 ] 30 [ 42, 55, 58, 73, 81 ]

                          ↑

                       median

The first quartile, Q₁, is the median of the first half of data. This is the median of [ 2, 5, 9, 11, 18 ]. The median is the value of the middle so it is 9.

The third quartile, Q₃, is the median of the second half of data. This is the median of [ 42, 55, 58, 73, 81 ]. The median, again, is the middle, so it is 58.

And, IQR = Q₃ - Q₁ = 58 - 9 = 49.