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
dimaraw [331]
3 years ago
9

PLZ answer quick!!!!!

Mathematics
1 answer:
Blizzard [7]3 years ago
3 0

Number of items sold by Shelley = 3 items.

Let us assume cost of each item sold by Shelley = $ x each.

Total cost of 3 items for Shelly sold = 3*x = 3x.

Number of items sold by Billy Bob = 4 items.

The cost of each item sold by Billy Bob = $2.25 less than the items that Shelley bought = $(x-2.25) each.

Total cost of 4 items for Billy Bob sold = 4*(x-2.25) = 4(x-2.25).

Both Shelley and Billy Bob paid the same amount of money. So, we can setup an equation now.

a) Total cost of 4 items for Billy Bob sold=Total cost of 3 items for Shelly sold.

4(x-2.25) = 3x

b) Solving equation for x now.

Distributing 4 over (x-2.25), we get

4x - 4*2.25 = 3x.

4x -9 = 3x.

Adding 9 on both sides, we get

4x -9+9 = 3x+9

4x =3x+9.

Subtracting 3x from both sides, we get

4x-3x =3x-3x+9.

x = 9.

c) Checking the solution of the equation by plugging x=9 in equation we got above.

4(x-2.25) = 3x  => 4(9-2.25)= 3*9

               => 4*6.75 = 27

               => 27 = 27.

We got left side = right side. So the solution x=9 is correct.

d) The cost of each item sold by Billy Bob = 9-2.25 = $6.75

Therefore, the cost of each item sold by Shelley is $9 and cost of each item sold by Billy Bob is $6.75.

You might be interested in
Find the midpoint of the segment with the following endpoints.<br> (8,5) and (0, -1)
Karo-lina-s [1.5K]

Answer:

(4,2)

Step-by-step explanation:

Midpoint =\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)\\\\\left(x_1,\:y_1\right)=\left(8,\:5\right),\:\\\left(x_2,\:y_2\right)=\left(0,\:-1\right)\\\\=\left(\frac{0+8}{2},\:\frac{-1+5}{2}\right)\\\\= (\frac{8}{2} , \frac{4}{2} )\\\\Simplify\\=\left(4,\:2\right)

6 0
3 years ago
Suppose that you are asked to conduct a study to determine whether smaller class
weeeeeb [17]

Answer:

a. correlation

b. inverse linear correlation exists If the higher the population of students lead to a decrease in test score,

c. yes

Step-by-step explanation:

a. Correlation is a measure of the amount of association existing between two variables.

b. For linear correlation, if points are plotted on a graph and all the points lie on a straight line, then perfect linear correlation is said to exist. When a straight line having a positive gradient can reasonably be drawn through points on a graph positive or direct linear correlation exists,

Similarly,when a straight line having a negative gradient can reasonably be drawn through points on a graph, negative or inverse linear correlation exists,

The results of this determination give values of r lying between +1 and −1, where +1 indicates perfect direct  Positive linear correlation and −1 indicates perfect inverse correlation or Negative linear correlation and 0 indicates that no correlation exists.

If the higher the population of students lead to a decrease in test score, there will definitely be a negative correlation between class size and test score. i.e low class size result in high test score which consequently lead to high performance.

c. YES

A negative correlation means low class size result in high test score which consequently lead to better performance.

8 0
3 years ago
A line has a y intercept of 7 and a slope of 3/4, and goes DOWNHILL. What is the equation of this line?
Vladimir79 [104]

the answer is b, if not then try d:)

4 0
3 years ago
Read 2 more answers
What is the greatest possible number of real zeros of f(x) = x3 – 2x2-x+1?
Sedaia [141]

Answer:

Step-by-step explanation:Use the drop-down menus to identify the roots in these English words.

Aristocratic:  

Incredulous:  

Contradiction:  

Regeneration:  

6 0
3 years ago
The value of 7 in 375,081 is 7000
Morgarella [4.7K]
70,000 when a zero is in between you gonna count it
5 0
3 years ago
Other questions:
  • I need help with number 26 plz
    13·2 answers
  • The diameter of a cylinder is 6 feet 6 inches. The height of a cylinder is 12 feet 3 inches. What is the surface area?    (feet
    11·1 answer
  • the towns of jackson,bellevue,salem,and denton lie along a highway,in the order listed . the destance from jackson to salem is 8
    15·1 answer
  • Peak hydraulic systems demands may be met by the use of what ?
    14·1 answer
  • What is the reference angle for 5pie/3
    8·2 answers
  • A caterer prepared a large ham that weighed 15 1/8 pounds . After cooking , the chef trimmed the ham and removed the bone , so t
    14·2 answers
  • Find the product and the quotient. 1/2 x 1/5 and 1/5 divided by 2
    15·2 answers
  • I wil Mark BRANLIEST!! HELP!!!! Consider the graphs of linear function f(x) = 3x, quadratic function g(x) = 3x2, and exponential
    5·1 answer
  • What is tooth plapue​
    14·1 answer
  • An arrow is moving at 35 m/s and travels for 5 seconds. How far did the arrow travel?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!