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
HACTEHA [7]
3 years ago
9

The difference of the square of a number and 28 is equal to 3 times that number find the positive solution

Mathematics
1 answer:
lutik1710 [3]3 years ago
8 0
<h2>The required positive number is 7.</h2>

Step-by-step explanation:

Let the number = x

To find, the positive number = ?

According to question,

x^{2}-28=3x

⇒ x^{2} - 3x - 28 = 0

By Factorisation method,

⇒ x^{2} - 7x + 4x - 28 = 0

⇒ x(x - 7) + 4(x - 7) = 0

⇒ (x - 7)(x + 4) = 0

⇒ x - 7 = 0 or, x + 4 = 0

⇒ x  = 7 or, x = - 4 [ - 4 is a negative number)

⇒ x  = 7

Thus, the required positive number is 7.

You might be interested in
A square has a perimeter of 36x - 12. Which expression represents one side of the<br> square?
valina [46]

Answer:

9x - 3

Step-by-step explanation:

Hello!

A square has 4 sides.

We can factor out 4 from the expression to find the value of one side.

Factor:

  • 36x - 12
  • 4(9x) - 4(3)
  • 4(9x - 3)

This means that each side of the square is 9x - 3 units long.

6 0
1 year ago
In a 5% sale, the price of a phone is reduced by £19.4 Find the original price of the phone
gulaghasi [49]

Answer:

The original price of the phone is £388.

Step-by-step explanation:

Since 5% of the price of the phone is reduced, you can simply multiply the reduced number which is £19.4 by 20.  Your final answer should be £388 when you put it on a calculator or do it on a piece of paper.

4 0
2 years ago
Pls someone help idk
tino4ka555 [31]

Answer:

first one c and the second on b

Step-by-step explanation:

3 0
3 years ago
What is the solution to 4(x-1)-2(3x+5)=-3x-1
Margarita [4]

To solve this problem, we need to get the variable x alone on one side of the equation. To begin, we are going to use the distributive property twice on the left side of the equation to expand the multiplication and get rid of the parentheses.

4(x-1) - 2(3x + 5) = -3x -1

4x - 4 -6x - 10 = -3x - 1

Next, we should combine like terms on the left side of the equation. This means we should add/subtract the variable terms and the constant terms in order to simplify this equation further.

-2x - 14 = -3x - 1

Then, we have to add 3x to both sides of the equation to get the variable terms all on the left side of the equation.

x - 14 = -1

After that, we should add 14 to both sides of the equation to get the variable x alone one the left side of the equation.

x = 13

Therefore, the answer is 13.

Hope this helps!

4 0
3 years ago
Read 2 more answers
PLEASE HELP!! I WILL GIVE BRAINLIEST!!!
Cerrena [4.2K]

Answer:

Step-by-step explanation:

I HAVE NO IDEA THIS WAS A QUESTION FRO ME AND I GOT IT WRONG

PLEASE GIVE ME BRAINLIEST

8 0
3 years ago
Read 2 more answers
Other questions:
  • What order do these numbers go in: <br> 0.7, 85% and 4/5
    14·1 answer
  • Find the y-intercept of 2x - 7y =28
    7·2 answers
  • How to convert fractions?
    10·1 answer
  • Mark for review (Will be highlighted on the review page) 1. Solve this equation: 80 = 3y + 2y + 4 + 1.
    10·1 answer
  • Help me please I need the answer fast​
    12·1 answer
  • -2 - (8)<br> I don’t know what is the answer can someone help me
    5·1 answer
  • I really need math help, it’s slopes
    14·1 answer
  • X + 2 + 6 = 8<br> please help
    11·2 answers
  • Crazy Valentine's day Work sheet. SOOOO CONFUSEDDD! Answered 1 and 3.
    6·1 answer
  • Type the correct answer in each box.<br><br> The value of x is ___°, and the value of y is ___°.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!