1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Charra [1.4K]
3 years ago
5

3 times the sum of y and 9 in algebraic expression please help me out!!

Mathematics
1 answer:
Ray Of Light [21]3 years ago
3 0

3(y+9)

plz plz mark brainliest if it helps

You might be interested in
lauren has 4 3/8 cups of flour. each batch of her pancake batter needs 1 1/4 . how many batches of ger batter can she make
Citrus2011 [14]
I think it is 4 1/8. Sorry If I am wrong, just trying to help.
6 0
3 years ago
Read 2 more answers
The Los Angeles Times regularly reports the air quality index for various areas of Southern California. A sample of air quality
egoroff_w [7]

Answer:

1. (a) 32     (b) 8

2. (a) 48.33    (b) 92.75    (c) 9.63

3.  We observe that sample mean of air quality index in Pomona is higher that that of Anaheim which indicates that the level of air pollution is higher in Pomona and there is more health concern here.

On the other hand, the variation in air quality index is higher in Anaheim than in Pomona as Anaheim has higher variance and standard deviation for air quality index which means that there are not much fluctuations in air quality index in Pomona.  

Step-by-step explanation:

First arranging our data of air quality index values for Pomona in ascending order, we get : 28, 42, 45, 48, 49, 50, 55, 58, 60.

  1. (a) Range is given by the formula :

                      Highest value in data - Lowest value in data = 60 - 28 = 32

        (b) Interquartile rage = Third quartile - First quartile

                                           = Q_3 - Q_1

             Q_1 =  (\frac{n-1}{4} )^{th} observation in the data = 2^{nd} obs. { Because n = 9}

                 Therefore, Q_1 = 42.

             Q_3 = (3Q_1)^{th} obs. = (3 x 2 ) = 6^{th} obs = 50

             So, Interquartile rage = 50 - 42 = 8.

     2. (a) Sample mean formula =  \frac{\sum X_i}{n} = \frac{28+ 42+ 45+ 48+ 49+ 50+ 55+ 58+ 60}{9} = 48.33

         (b) Sample variance formula = \frac{\sum (X_i - Xbar)^{2}}{n-1} where Xbar = Sample mean

                                                         = 92.75

          (c) Sample standard deviation  formula = \sqrt{variance} = \sqrt{92.75} = 9.63.

     3. Given that a sample of air quality index readings for Anaheim has   sample mean of 48.3, a sample variance of 136, and a sample standard deviation of 11.66.

We observe that sample mean of air quality index in Pomona is higher that that of Anaheim which indicates that the level of air pollution is higher in Pomona and there is more health concern here.

On the other hand, the variation in air quality index is higher in Anaheim than in Pomona as Anaheim has higher variance and standard deviation for air quality index which means that there are not much fluctuations in air quality index in Pomona.  

                                       

7 0
3 years ago
Gloria had two sets of alphabet cards (A–Z). She mixed the two sets together to form a single stack of cards. Then Gloria drew t
grin007 [14]
She has 52 card all together so she has a probability of drawing on the first draw 4 L's or R's because their are two sets of alphabet cards.  So that is 4/52 or 1/13 to the lowest term.  Second turn she only has 51 cards to draw from and still has 4 L's and R's so that would be 4/51 and on the third try she has only 50 cards left so that would be 4/50 or 2/25 to the lowest term.  Now multiply all three factions 1/13 x 4/51 x 2/25 = 8/16575 meaning out of the three draws she has a probability of getting a L or R, 8 out of 16575 each draw.
3 0
3 years ago
What's the awnser to the one about Isabella
Irina18 [472]
I cant even see the picture clearly

6 0
3 years ago
What was the impact of the olive branch petition
gizmo_the_mogwai [7]
It failed to bring about peace and only angered King George III

The Olive Branch petition was a final attempt by the colonists to avoid going to war with Britain. The purpose was to appease King George III and prevent the conflict between the colonies and Britain from escalating into a full blown war. However, the king refused to read it. And then came the war.
5 0
3 years ago
Other questions:
  • Simplify the expression (3x^3 y^-2)^-4
    7·1 answer
  • The time of 15 seconds out of 2 minutes is
    6·1 answer
  • Here are the grades ! Help me please
    7·1 answer
  • A scenic overlook which extends over a ravine is shaped like a kite.
    15·1 answer
  • what is the relationship between the coordinates of a point and the coordinates of its reflection across each axis?
    14·1 answer
  • Solve for x.
    8·1 answer
  • Scott wants to buy fencing to place around a circular rock garden. The diameter of the circle is 16 feet. Using 3.14 for π, Calc
    15·1 answer
  • If f(x)=3(x+5)+4/x what is f(a+2)
    6·1 answer
  • The principle <br><br>P=6000 A=6810 T=3 years
    14·2 answers
  • Write an expression using fractions to show how to determine the amount that each person will pay. Then calculate each person's
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!