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
avanturin [10]
3 years ago
7

Find the factors of 4x2-16x-9.

Mathematics
2 answers:
zzz [600]3 years ago
5 0

Answer:

Step-by-step explanation:

4x^2-16x-9.\\Writ -16x - as -a -difference\\ 4x^2 +2x-18x -9 \\Factor -out- common- terms\\2x(2x+1)-9(2x+1)\\ Factor -out (2x+1)\\(2x+1)(2x-9)

I Hope It Helps :)

Wewaii [24]3 years ago
3 0

Answer:

\boxed{\sf (2x - 9)(2x + 1)}

Step-by-step explanation:

\sf Factor  \: the \:  following: \\  \sf  \implies 4 {x}^{2}  - 16x - 9 \\  \\  \sf Factor \:  the \:  quadratic  \: 4  {x}^{2} -   16 x  -  9.  \\ \sf The  \: coefficient  \:   of  \:  {x}^{2}  \:  is  \: 4  \: and  \: the \:  constant  \\ \sf term  \: is  \:  - 9.  \: The \:  product  \: of \:  4  \: and  \:  - 9 \:  is \\ \sf  - 36.  \: The \:  factors  \: of  \: - 36 \:  which \:  sum \:    to \\ \sf  - 16  \: are \:  2 \:  and  \:  - 18.  \\  \sf So, \\  \sf \implies 4 {x}^{2}  - (18 - 2)x - 9 \\  \\  \sf \implies 4 {x}^{2}  - 18x + 2x - 9 \\  \\  \sf \implies 2x(2x - 9) + 1(2x - 9) \\  \\  \sf Factor \:  2x  - 9 \:  from \: 2x(2x - 9) + 1(2x - 9) :  \\  \sf \implies (2x - 9)(2x + 1)

You might be interested in
1/3y=3<br> Find the value of y
Ivanshal [37]
Answer is 1/9
Hope it help!!

6 0
3 years ago
A geologist examines 14 geological samples for iron concentration. The mean iron concentration for the sample data is 0.181 cc/c
kykrilka [37]

Answer:

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645*\frac{0.0318}{\sqrt{14}} = 0.0140

The lower end of the interval is the sample mean subtracted by M. So it is 0.181 - 0.0140 = 0.167 cc/m³.

The upper end of the interval is the sample mean added to M. So it is 0.181 + 0.0140 = 0.195 cc/m³.

The 90% confidence interval for the population mean iron concentration is between 0.167 cc/m³ and 0.195 cc/m³.

3 0
3 years ago
What is the value of x,if x=3²​
KatRina [158]

Answer:

x=9

Step-by-step explanation:

x = 3^2

x = 3*3

x=9

7 0
2 years ago
Read 2 more answers
How can you use the Pythagorean theorem to solve problems
riadik2000 [5.3K]
The photo below shows -

7 0
3 years ago
D
lions [1.4K]

Answer:

I think its A tell me if i'm right :)

Step-by-step explanation: and B i'm not 100% sure

5 0
3 years ago
Read 2 more answers
Other questions:
  • Tom worked 74 hours in 2 weeks. if he earns 7.55 a hour, how much did he earn in the 2 week period?
    14·2 answers
  • What is the difference between- 30F and 85F
    13·2 answers
  • If you have 1996 cookies and someone takes away 2334
    5·2 answers
  • MARK AS BRAINLIEST!!
    11·1 answer
  • Pleaseee help meeeeeeee
    6·2 answers
  • The value of 6.8x10^2x1.3x10^-3 In standard form
    6·2 answers
  • Noah was playing with his wooden blocks and created a house.
    7·2 answers
  • F(x) = 5x2 - X+ 3<br><br><br> Please help
    11·1 answer
  • Solving Equations with the Variable on Each Side
    11·1 answer
  • The circumference of a circle is 19 pi meters. What is the radius in meters?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!