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
Yuri [45]
3 years ago
9

Explain why the polynomial 144x2 − 200x + 81 is not a perfect square.

Mathematics
1 answer:
Sloan [31]3 years ago
5 0
The square root of 144x^2 = 12 x
and square root of + 81 = 9 or -9

if  this polynomial were a perfect square then its factors would be 
(12x - 9)(12x - 9)

but its not a perfect squre because (12x - 9)(12x - 9)  = 144x^2 - 216x + 81.
You might be interested in
The lifetime of a certain brand of battery is known to have a standard deviation of 9 hours. Suppose that a random sample of 90
Rina8888 [55]

Answer:

lower limit : 36.44

upper limit : 39.56

Step-by-step explanation:

Given :

s = 9

n = 90

x = 38.9

Alpha, α = 0.10

∴ $z_{\alpha/2}=z_{0.05} = 1.645$

The confidence interval is :

$=x \pm\left(z_{\alpha /2} \times \frac{s}{\sqrt{n}}\right)$

$=38.9 \pm\left(1.645 \times \frac{9}{\sqrt{90}}\right)$

$=38.9 \pm 1.56$

$=(36.44, 39.56)$

Therefore,

lower limit : 36.44

upper limit : 39.56

3 0
3 years ago
A piece of fabric 4 meters long is cut into two pieces. One piece is 1.25 meters long. How much longer is the second piece of fa
MAVERICK [17]

Answer:

1.5 meters

Step-by-step explanation:

the fabric is 4 meters long

first piece is 1.25 meters long

second piece will be (4-1.25)=2.75 meters long

therefore the second piece is (2.75-1.25) meters longer

4 0
3 years ago
Read 2 more answers
Helpppp anyoneee please!!
pshichka [43]

Answer:x=6

Step-by-step explanation:

So if y is 0, that’s 8(y) which is 0. That means the equation is 2x=12, which means x is 6

My comments don’t work! But it’s (6,0)

4 0
3 years ago
The area of this rectangle is 5x^2. What does the coefficient 5 mean in terms of the problem
Svetach [21]

it means that the length is 5 times the width

5 0
4 years ago
Read 2 more answers
The sum of 1 and 7 times a number is 64. write and solve an equation to determine the number. select the solution and graph that
vichka [17]

x = 8, 1 + 7 +8 and 8 x 8 equals 64. good luck!

3 0
4 years ago
Read 2 more answers
Other questions:
  • Evaluate the expression 8(36×8-204)÷6​
    7·2 answers
  • A closed cylindrical vessel contains a fluid at a 5MPa pressure. The cylinder, which has an outside diameter of 2500mm and a wal
    9·1 answer
  • What is the greatest factor of 52 that is a prime number
    13·2 answers
  • I really appreciate the help guys
    13·1 answer
  • The projected worth (in millions of dollars) of a larger company is modeled by the equation w=241(1.06)t. The variable t represe
    7·1 answer
  • A music store conducted a survey. It showed that the number of CDs purchased by a shopper decreases with the
    7·1 answer
  • Help me please
    8·1 answer
  • Can I please know how to solve this
    11·2 answers
  • Increase 31 kg by 100%.​
    8·1 answer
  • In a basketball game, Jacob gets 4/9 of the rebounds and Adam gets 3/8 of the rebounds for their team. What fraction of the rebo
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!