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
Sergeu [11.5K]
3 years ago
11

Which is the correct factoring of

Mathematics
1 answer:
Igoryamba3 years ago
7 0

Answer:

C. (X+2)(x-6)

Step-by-step explanation:

  • x^2-4x-12
  • x^2-6x+2x-12
  • x(x-6)+2(x-6)
  • (x+2)(x-6)
You might be interested in
I need help to see if their equivalent help fast pls
Taya2010 [7]
They are <em><u>not</u></em><u> </u>equivalent. When you <em>distribute the 1/4</em>, the <em><u>expressions are different</u></em>. 
8 0
3 years ago
The mean preparation fee H&amp;R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use t
astraxan [27]

Answer:

a)0.6192

b)0.7422

c)0.8904

d)at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

Step-by-step explanation:

Let z(p) be the z-statistic of the probability that the mean price for a sample is within the margin of error. Then

z(p)=\frac{ME*\sqrt{N}}{s } where

  • Me is the margin of error from the mean
  • s is the standard deviation of the population
  • N is the sample size

a.

z(p)=\frac{8*\sqrt{30}}{50 } ≈ 0.8764

by looking z-table corresponding p value is 1-0.3808=0.6192

b.

z(p)=\frac{8*\sqrt{50}}{50 } ≈ 1.1314

by looking z-table corresponding p value is 1-0.2578=0.7422

c.

z(p)=\frac{8*\sqrt{100}}{50 } ≈ 1.6

by looking z-table corresponding p value is 1-0.1096=0.8904

d.

Minimum required sample size for 0.95 probability is

N≥(\frac{z*s}{ME} )^2 where

  • N is the sample size
  • z is the corresponding z-score in 95% probability (1.96)
  • s is the standard deviation (50)
  • ME is the margin of error (8)

then N≥(\frac{1.96*50}{8} )^2 ≈150.6

Thus at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

7 0
3 years ago
I really need help do can someone do it step by step so I can understand plzzzz​
Alekssandra [29.7K]

Answer:

64 × pi m²

Step-by-step explanation:

the formulas needed for the surface area of a cone are :

base area plus the "mantle", the lateral "wall" around it.

the base area is a circle.

so, that formula is Ac = pi×r²

the "wall" formula is Aw = pi×r×s

r = radius

s = slant height = 12

the formula for the surface area of a sphere is

As = 4×pi×r²

we know now, that both surface areas are the same, and also the radius is the same for both objects.

Ac + Aw = As

pi×r² + 12×pi×r = 4×pi×r²

=>

12×pi×r = 3×pi×r²

12×pi = 3×pi×r

12 = 3×r

r = 4 m

now, we only need to use this value of r in our formulas for surface areas, like for the sphere :

4×pi×r² = 4×pi×4² = 4³×pi = 64×pi

3 0
2 years ago
Find the measure of angle X.
densk [106]

Answer:

x = 23 degrees

Because if you look at diagram x is vertical to angle FBC, and angle FEC and angle EBA are alternate interior angles so they are equal to each other, and AC is a straight line which means it equals to 180 degrees.

4x+65+x = 180

x = 23 degrees

5 0
1 year ago
Read 2 more answers
Answer... please i need
FrozenT [24]

Answer:9/6 or simplified 1 1/2

Step-by-step explanation:

7 0
1 year ago
Read 2 more answers
Other questions:
  • the endpoints of the side of rectangle ABCD in the coordinate plane are A (3,7)and B(4,1).Find the equation of the line that con
    7·1 answer
  • Can -2y = -6 be written in slope-intercept form? If so, what is it?
    8·2 answers
  • Find the unknown measure of the rectangle.<br> Area =28 square centimeters <br>Height =?
    13·2 answers
  • allenbrights electronics is having a 25% off sale. If the ratio is sale priced at $135 what is the regular price?
    10·1 answer
  • Tess rolls 2 fair dice. <br> What is the probability of obtaining two 4's?
    12·2 answers
  • HELP ASAP ILL GIVE BRAINLIEST!!!
    6·1 answer
  • Sarah is playing a video game that allows her to double her coins each hour. The game starts with 4 coins and Sarah plays the ga
    11·1 answer
  • Sally read that a recent survey found that 56% of all American adults own a smartphone. She asked her friend Alexandra what the
    15·1 answer
  • A store marks up a laptop 50% from its original price of $299. What is the new price for the computer?
    10·1 answer
  • What is the value of 2\5 + 3\7?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!