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
Orlov [11]
3 years ago
7

The square of a negative number is twenty-eight more than three times the negative number. Find the number.

Mathematics
2 answers:
MAXImum [283]3 years ago
8 0
The number is x

it is negative
the square is 28 more than 3 times itself
x²=28+3x
minus (28+3x)
x²-3x-28=0
factor
(x-7)(x+4)=0
set to zero

x-7=0
x=7
this is not the answer because we were told the number was negative


x+4=0
x=-4
correct

the number is -4
test
(-4)²=28+3(-4)
16=28-12
16=16
check


the number is -4
Pani-rosa [81]3 years ago
4 0
-4 that's the end result
You might be interested in
-2/3+(-1/6) <br><br> -1/4+(-3/8) <br><br> -1/4+(-1/2) <br><br> Need answers to all of them!!
miss Akunina [59]

Answer:

Step-by-step explanation:

Vjn

4 0
3 years ago
Read 2 more answers
During a period of 30 working days, Deborah was late 80% of the time. How many days was she late?
erik [133]
Fairly straightforward question. She works 30 days and is late 80% or 0.8
We can model our equation
Num days late = late percentage * num working days
Basically fine portion of working days that she was late.

Num days late = 0.8 * 30=24

So Deborah was late 24 out of 30 working days. Would appreciate a brainliest
8 0
2 years ago
A cone has a volume of 12 cubic inches. What is the volume of a cylinder that the cone fits exactly inside of?
Sunny_sXe [5.5K]
11 cubic inches yahhhh

8 0
3 years ago
Read 2 more answers
Kevin needs to replace four rectangular
LekaFEV [45]
To find the measure of a singular window we need to find the area which is length times width. so that's 2.75(4) which is 11 square feet. However, Kevin has four windows which means he needs 11(4) square feet for all the windows. Which would mean Kevin needs 44 sqaure feet.
5 0
2 years ago
2/5 is larger than 1/4. What is the difference?
Mila [183]
If you convert the fractions to ___/20 then you will see. Here; 2/5 = 8/20. 1/4 = 5/20. I hope this helps. 
6 0
3 years ago
Other questions:
  • A shipment to a warehouse consists of 1000 smart phones. The manager chooses a random sample of 50 smart phones and finds that 5
    15·1 answer
  • Y=x+5 what is the slope?
    11·2 answers
  • What are the next three terms of the arithmetic sequence -18, -13, -8, -3,…?
    5·1 answer
  • Need help asp please
    13·1 answer
  • Angle 3 is 65 degrees. solve for x if angle 5 is equal to 5x.
    12·1 answer
  • Need help with other math who’s gonna help me brainlest and points
    5·1 answer
  • What is the axis of symmetry for y=8x2+2x−6?
    14·1 answer
  • 1.
    14·1 answer
  • 3) T'challa makes $55 an hour and works 30 hours a week. He loses 20% of his paycheck to
    10·2 answers
  • I'll give brainliest to the right answer!!!
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!