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
bagirrra123 [75]
2 years ago
7

PLEASE HELP <3

Mathematics
2 answers:
vovangra [49]2 years ago
8 0

Step-by-step explanation:

3 1/8 + 2 3/8 - 1 1/4 = 17/4 = 4 1/4 = 4.25

quester [9]2 years ago
3 0

Answer:

-403/40

or

-10 3/40

or

-10.075

You might be interested in
Risk taking is an important part of investing. In order to make suitable investment decisions on behalf of their customers, port
GrogVix [38]

Answer:

a=49.5 -1.28*15=30.3

So the value of height that separates the bottom 10% of data from the top 90% is 30.3.  

If the score is lower than 30.3 we consider this score as risk averse

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

X \sim N(49.5,15)  

Where \mu=49.5 and \sigma=15

We are interested in the bottom 10% of the data.

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.9   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.1 of the area on the left and 0.9 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.1 and P(z>-1.28)=0.9

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-1.28

And if we solve for a we got

a=49.5 -1.28*15=30.3

So the value of height that separates the bottom 10% of data from the top 90% is 30.3.  

If the score is lower than 30.3 we consider this score as risk averse

7 0
3 years ago
The price of an item yesterday was $115. Today, the price rose to $161. Find the percentage increase
mamaluj [8]

Answer:

14%

Step-by-step explanation:

161/115 = 1.4 which you times by 100

4 0
3 years ago
Which set of numbers best describes the possible values of x in the equation below?[x-1]=[x] all integer values of x all real nu
SCORPION-xisa [38]

[x] represents floor function also called as Greatest integer function.

Floor function is the function that takes as input a real number and gives as output the greatest integer less than or equal to.

like [1.5]=1

[0.7]=0

[-0.3]=-1

Now we have to find set of x-values which satisfies equation [x-1]=[x]

Due to -1 in [x-1], it always produces output value one less than value of [x]

for example when x=0.5 then [x]=[0.5]=0, [x-1]=[0.5-1]=[-0.5]=-1

when x=1.5 then [x]=[1.5]=1, [x-1]=[1.5-1]=[0.5]=0

when x=3 then [x]=[3]=3, [x-1]=[3-1]=[2]=2

From above results we can see that there is no value of x which satisfies the given equation [x-1]=[x]

Hence there is NO solution.

3 0
3 years ago
Read 2 more answers
A dive ring on the bottom of the pool is 10 feet below the surface of the water. Sabine dives down and brings the ring back to t
MissTica

The surface of the water is 0 feet. So 10 feet down means it is 0 - 10, or -10 feet as its final position.


8 0
3 years ago
Read 2 more answers
How do you interpret expressions that represent a quantity in terms of its context?
natali 33 [55]
Interpret parts of an expression, such as terms, factors, and coefficients. Interpret complicated expressions by viewing one or more of their parts as a single entity. For example, interpret P(1+r)n as the product of P and a factor not depending on P. Use the structure of an expression to identify ways to rewrite it.
3 0
3 years ago
Other questions:
  • On a map the key indicates that one inch equals 50 miles. It is 600 miles from Ricky's house to the Willis tower in Chicago. Wha
    12·1 answer
  • Mr. Harper's car used 5 gallons of gasoline to travel 150 miles. After he had some work done on the cars engine ,it used it used
    11·2 answers
  • THIS QUESTION IS WORTH 15 POINTS
    10·1 answer
  • -19+3x-11+2x=2 .......?
    5·2 answers
  • What does it mean when a figure is dilated by a scale factor of 1/4
    12·2 answers
  • A caterer makes 15 3/4 quarts of tomato soup. He pours 2 cups of soup into each bowl. How many quarts of soup are in each bowl?
    15·1 answer
  • Equal Sides<br>4 what is that shape​
    14·2 answers
  • A rectangle’s width is one-fourth of its length. Its area is 9 square units. The equation l(l) = 9 can be used to find l, the le
    14·1 answer
  • Lo ran 6 ¼ miles Thelma ran 1 2/3 miles.<br> How many times further did Lo run than Thelma?
    11·1 answer
  • Determine if the following triangles are congruent by SSS or SAS.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!