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
olasank [31]
3 years ago
5

3x 2+ 4x - 20 using grouping or an area model.

Mathematics
1 answer:
murzikaleks [220]3 years ago
6 0

Answer:

Is the 3x a power of 2, once I get that info I'll edit my answer

Step-by-step explanation:

You might be interested in
There are 4 people at a party. Consider the random variable X=’number of people having the same birthday ’ (match only month, N=
yulyashka [42]

Answer:

S = {0,2,3,4}

P(X=0) = 0.573 , P(X=2) = 0.401 , P(x=3) = 0.025, P(X=4) = 0.001

Mean = 0.879

Standard Deviation = 1.033

Step-by-step explanation:

Let the number of people having same birth month be = x

The number of ways of distributing the birthdays of the 4 men = (12*12*12*12)

The number of ways of distributing their birthdays = 12⁴

The sample space, S = { 0,2,3,4} (since 1 person cannot share birthday with himself)

P(X = 0) = \frac{12P4}{12^{4} }

P(X=0) = 0.573

P(X=2) = P(2 months are common) P(1 month is common, 1 month is not common)

P(X=2) = \frac{3C2 * 12P2}{12^{4} } + \frac{4C2 * 12P3}{12^{4} }

P(X=2) = 0.401

P(X=3) = \frac{4C3 * 12P2}{12^{4} }

P(x=3) = 0.025

P(X=4) = \frac{12}{12^{4} }

P(X=4) = 0.001

Mean, \mu = \sum xP(x)

\mu = (0*0.573) + (2*0.401) + (3*0.025) + (4*0.001)\\\mu = 0.879

Standard deviation, SD = \sqrt{\sum x^{2} P(x) - \mu^{2}}  \\SD =\sqrt{ [ (0^{2} * 0.573) + (2^{2}  * 0.401) + (3^{2} * 0.025) + (4^{2} * 0.001)] - 0.879^{2}}

SD = 1.033

4 0
4 years ago
An above-ground swimming pool in the shape of a cylinder has a diameter of 18 feet and a height of 4.5 feet. If the pool is fill
laila [671]

The volume of a cylinder is

                                   (pi) (radius²) (height) .

Radius = 1/2 diameter.
Radius of this pool = (1/2) (18 ft) = 9 ft

The pool is a cylinder with height of 4.5 feet. 
The water in it is also a cylinder, but only 4 ft high.

Volume of the water =

             (pi) x (radius²) x (height)

         =  (pi)  x  (9 ft)²  x  (4 ft)

         =  (pi)  x  (81 ft²)  x  (4 ft)

         =  (pi)  x  (324 ft³)  =  1,017.9 ft³ .

7 0
3 years ago
Read 2 more answers
The measure of an angle is 133°. What is the measure of its supplementary angle?
Pachacha [2.7K]

Answer:

47

Step-by-step explanation:

180 - 133 = 47

7 0
3 years ago
Determine if the number is a whole number, integer, or rational number. Select all sets to which the number belongs.
agasfer [191]

Answer:

Rational,integer

Step-by-step explanation:

7 0
3 years ago
Can someone please help
Alik [6]

Answer:

B. 81 weeks

Step-by-step explanation:

If we plug everything into the equation it should look like this:

82 = w + 1

Then we would subtract 1 from both sides, then we are left with <em>w:</em>

<em />w = 81<em />

<em />

<em>Hope this helps!</em>

8 0
3 years ago
Other questions:
  • Find the cosine of angle B.
    14·1 answer
  • Which angle number represents &lt;EHK
    15·1 answer
  • 40 points!!! Please Help!!! (MATH) Will give Brainliest!!!
    10·1 answer
  • Write an equation that involves multiplication, contains a variable and has a solution of 5
    6·1 answer
  • I need help doing this
    5·1 answer
  • Suppose there is a 20% chance that revenue will exceed expectations, a 10% chance that costs will be lower than expected, and a
    10·1 answer
  • Helppppppppppp please!!!
    15·1 answer
  • Gloria is making bouquets with silk
    10·2 answers
  • I need help with this plz
    14·1 answer
  • Without using a calculator, determine whether 1 728 is a perfect square, a perfect cube, or
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!