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
spayn [35]
3 years ago
8

Averages Question please help!

Mathematics
1 answer:
klio [65]3 years ago
7 0
Hope this helps
1.48 to 2 decimal places

You might be interested in
SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a standard deviation of 4.8.
Y_Kistochka [10]

Answer:

The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.

Step-by-step explanation:

Mean SAT scores = 1026

Standard Deviation = 209

Mean ACT score = 20.8

Standard Deviation = 4.8

We are given SAT and ACT scores of a student and we have to compare them. We cannot compare them directly so we have to Normalize them i.e. convert them into such a form that we can compare the numbers in a meaningful manner. The best way out is to convert both the values into their equivalent z-scores and then do the comparison. Comparison of equivalent z-scores will tell us which score is higher and which is lower.

The formula to calculate the z-score is:

z=\frac{x-\mu}{\sigma}

Here, μ is the mean and σ is the standard deviation. x is the value we want to convert to z score.

z-score for junior scoring 860 in SAT exam will be:

z=\frac{860-1026}{209}=-7.59

z-score for junior scoring 16 in ACT exam will be:

z=\frac{16-20.8}{4.8}=-1

The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.

4 0
3 years ago
WORDED QUADRATIC EQUATION!!! PLS HELP <br><br> MOSTLY NUMBER 5 PLS
pav-90 [236]

Answer:

7,11

Step-by-step explanation:

The width is x. x+4= the length. The area is side times side, so it’s

x × (x+4) = 77

We can simplify this to:

x × x + x × 4 = 77

x^2 + 4x = 77

x^2 + 4x - 77 = 0 This is a quadratic equation. So we can solve using the quadratic formula:

x = \frac{-4\pm\sqrt{4^2-4\cdot1\cdot-77}}{2\cdot1} ->

\frac{-4\pm18}{2}

\frac{14}{2} \implies7

That’s the positive solution and that’s x, the width. So the width is 7 and the length is 7+4=11

3 0
2 years ago
Tara ran 3 laps around her neighborhood for a total of 1 mile yesterday today she wants to run 2/3 of a mile. How many laps will
ivann1987 [24]

Answer:

2

Step-by-step explanation:

6 0
3 years ago
What is the correct equation in Slope-Intercept Form?<br> (y = mx +b)
olganol [36]

Answer:

The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept. The y-intercept of this line is the value of y at the point where the line crosses the y axis.

Step-by-step explanation:

5 0
3 years ago
Dean is the manager of a restaurant and is evaluating whether or not the restaurant has enough parking spaces. At ten different
Colt1911 [192]

Answer:

d

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • The price of grapes, g, is $2.19 per pound. The price of bananas, b, is $0.59 per pound. The price of pears, p, is $1.49 per pou
    14·1 answer
  • X and Y are supplementary angles. Y measures 156 degrees. What is the measure of X
    13·2 answers
  • 7x=5y , find the slope and the y-intercept of each line whose equation is given.
    11·2 answers
  • Geometry Homework Help Please?
    8·1 answer
  • The Hernandez family has six
    8·1 answer
  • Complete each ratio table to solve each problem.
    11·1 answer
  • What is the percentage of 377 of 325?
    10·1 answer
  • 25. The figure shows a pie chart drawn to show the amount of white, yellow and pink flowers in a
    7·1 answer
  • A polynomial contains number of terms<br>​
    7·1 answer
  • Decrease 54 litres in the ratio 5:1​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!