if the sum of a term of an ap is 2n square + 5n then find the 4th term​

Answer:

26

Step-by-step explanation:

Subtract the mean (84) from each of the four scores, obtaining

2, -3, 3, - 2

These are the "deviations."

Next, square each of these four deviations, obtaining

(2)^2 = 4, and:

(-3)^2 = 9, and:

(3)^2 = 9, and:

(-2)^2 = 4

Then the sum of the squared deviations of the scores from the mean is 26.

Answer:

radius is 4.5 km

Step-by-step explanation:

Given :

Total number of people living in the area = 1.15 million = 1150000

Population density = 18075 people per sq kilometer

To find:

Radius of region = ?

Solution:

Population density of a region is defined as the ratio of total population divided by the area of the region.

Area here is circular. Let the radius be = r

Area of circle is given as [tex]\pi r^2[/tex]

Formula:

[tex]Population\ Density = \dfrac{Total\ population}{\pi r^2}[/tex]

Putting the values:

[tex]18075 = \dfrac{1150000}{\pi r^2}\\\Rightarrow r^2 = \dfrac{1150000}{18075\pi }\\\Rightarrow r^2 = \dfrac{63.62}{\pi }\\\Rightarrow r^2 = 20.26\\\Rightarrow \bold{r=4.5\ km}[/tex]

Therefore, radius is 4.5 km.

Answer:

a. yes

b. no

c. yes

d. yes

e. yes

f. no

Step-by-step explanation:

a regular polygon must be equiangular (all angles are same) and equilateral (all sides are same)

A. equilateral triangle, regular

B. is a rectangle and the sides of rectangle are not all equal, thus, not regular

C. octagon, regular

D. flipped pentagon, regular

E. square, regular

F. not normal pentagon, not regular

Answer:

a. yes  

b. no  

c. yes  

d. yes  

e. yes  

f. no

Step-by-step explanation:

a regular polygon must be equiangular (all angles are same) and equilateral (all sides are same)

A. equilateral triangle, regular

B. is a rectangle and the sides of rectangle are not all equal, thus, not regular

C. octagon, regular

D. flipped pentagon, regular

E. square, regular

F. not normal pentagon, not regular

3h * 2

three hours every two paragraph

Answer:

VM=15

Step-by-step explanation:

4x-1=3x+3 becuase M is the mid point, which makes both sides equal.

Subtract 3x to both sides to get x-1=3.

Add 1 to both sides to get x=4.

Subsitue 4 into the equation 4x-1 to find the lengh of VM.

4(4)-1=

16-1=

15

Using the midpoint concept, it is found that the length of the line segment is of 30 units.

The midpoint divides the line into two segments of equal length, hence [tex]VM = MW[/tex].

Their lengths, as functions of x, are given by:

[tex]VM = 4x - 1[/tex]

[tex]MW = 3x + 3[/tex]

They have the same lengths, hence:

[tex]4x - 1 = 3x + 3[/tex]

[tex]x = 4[/tex]

Hence:

[tex]VM = 4x - 1 = 4(4) - 1 = 16 - 1 = 15[/tex]

[tex]MW = VM = 15[/tex]

The total length is:

[tex]T = VM + MW = 15 + 15 = 30[/tex]

The length of the line segment is of 30 units.

A similar problem is given at https://brainly.com/question/24352869

Answer:

D - All rational numbers are integers.

Step-by-step explanation:

This is because integers is a subcategory of rational numbers, so there are other rational numbers that aren't integers.

Answer:

4-6+2x=14

2x=14+6-4

2x=16

x=8

Step-by-step explanation:

Answer:

Step-by-step explanation:this is easy just find x and times it by 2 and then it will equal 14 so the awser is 7

Answer:

Yes

Step-by-step explanation:

The given points are A(−3,−1), B(−3,2), C(6,9), and D(3,9).

Plot these points on a coordinate plane as shown in the below graph.

Distance formula:

[tex]D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

Using this formula, we get

[tex]AB=\sqrt{(-3-(-3))^2+(2-(-1))^2}[/tex]

[tex]AB=\sqrt{(0)^2+(3)^2}[/tex]

[tex]AB=3[/tex]

[tex]CD=\sqrt{(3-6)^2+(9-9)^2}[/tex]

[tex]CD=\sqrt{(-3)^2+(0)^2}[/tex]

[tex]CD=3[/tex]

Since AB=CD, therefore the required answer is yes, AB and CD are congruent.

Answer:

Ms. Davis=83 years

Her mom=126.33 years

Her daughter=66.67 years

Step-by-step explanation:

Let her mother's age=x

Ms. Davis= 7 dozens - 1

=(7*12)-1

=84-1

= 83 years

Ms. Davis= 7.2 + 60% of x

83=7.2 + .6x

83 - 7.2= .6x

75.8= .6x

Divide both sides by .6

75.8 / .6 = x

126.33 years

Ms. Davis daughter = 3.5 + 1/2 of x

=3.5 + 1/2(126.33)

=3.5 + 126.33 / 2

=3.5 + 63.165

=66.665

Approximately 66. 67 years

Answer: $ 7.20

Step-by-step explanation:

Multiply the cost ( 35.50) by 20% or 0.20 and you get your answer ( 7.20 ). Hope this helps!

Answer:

400,000

Step-by-step explanation:

Tel Aviv Population (2013) - 413,000

413,000 rounded to nearest hundred-thousand = 400,000

Final sum= 400,000. Hope this helps!

Answer: 400,000

The population of Tel Aviv in 013 was 413,000.

We have to round this number to the nearest 100,000.

We get 400,000, so it is the answer.

Answer:

B

Step-by-step explanation:

p(x) = x² - 2√2x + 1

p(2√2) = (2√2)² - 2√2*2√2 + 1

           =2²*(√2)² - 2*2*√2*√2  + 1

           = 4 *2 - 4*2 + 1

           = 8 - 8 + 1

           = 1

Answer:

B

Step-by-step explanation:

Given

p(x) = x² - 2[tex]\sqrt{2}[/tex] x + 1, then

p(2[tex]\sqrt{2}[/tex] )= (2[tex]\sqrt{2}[/tex] )² - 2[tex]\sqrt{2}[/tex](2[tex]\sqrt{2}[/tex] ) + 1 = 8 - 8 + 1 = 1 → B

Answer: a set of all possible inputs for the function.

Step-by-step explanation:

Answer:  A domain of a function is all set of inputs that make the function definable.

Step-by-step explanation:

Answer:

9/10

Step-by-step explanation:

Answer:

square root of 81

Step-by-step explanation:

[tex] \sqrt{81} = 9[/tex]

so 9 is rational number.

the rest are irrational number

Answer:

Option C.

Step-by-step explanation:

We know the following properties,

1. Product of an irrational number and a non-zero rational number is always an irrational number.

2. Sum of a rational and an irrational number is always an irrational number.

3. Sum or products of rational numbers are always a rational number.

In option A,

[tex]4\frac{2}{3}+\frac{\sqrt{3}}{9}[/tex]

Here, [tex]\sqrt{3}[/tex] is an irrational number.

[tex]\frac{\sqrt{3}}{9}[/tex] is an irrational number using property 1.

[tex]4\frac{2}{3}+\frac{\sqrt{3}}{9}[/tex] is an irrational number using property 2.

So, using the above properties we can say that this expression represents an irrational number.

Similarly,

In option B,

[tex]4\frac{2}{3}\times\frac{8}{\sqrt{3}}[/tex]

Here, [tex]\sqrt{3}[/tex] is an irrational number. So, using the above properties we can say that this expression represents an irrational number.

In option C,

[tex]4\frac{2}{3}-\frac{\sqrt{4}}{8}[/tex]

Here, [tex]\sqrt{4}=2[/tex], which is a rational number.

So, this expression represents a rational number using property 3.

In option D,

[tex]4\frac{2}{3}\times\frac{\sqrt{3}}{9}[/tex]

Here, [tex]\sqrt{3}[/tex] is an irrational number. So, using the above properties we can say that this expression represents an irrational number.

Therefore, the correct option is C.

We have two fractions being divided. When we divide two fractions, we flip the second fraction and multiply

1/12 divided by 1/6 = 1/12 * 6/1

-------

From here we multiply straight across.

The numerators multiply to get 1*6 = 6

The denominators multiply to 12*1 = 12

We end up with 6/12 which reduces to 1/2 when you divide both parts by the GCF 6

Answer:

20-3

43-2

73-2

Step-by-step explanation:

subtract bro

Answer:

1) 200 2) 7 3) 12.5

Step-by-step explanation:

For god's sake, use a calculator

Answer:

The pedestrian fatality rate for California per 100,000 residents would be;

= (858/39,536,653) * 100,000

= 2.17 people per 100,000

In Arizona that figure is;

= (216/7,016,270) * 100,000

= 3.08 people per 100,000

This shows that even though California has a higher number of pedestrian fatalities in absolute terms, when this figure is made relative to population, Arizona has more pedestrian fatalities.

Answer:

Decrease in TFR of 40%.

Step-by-step explanation:

Given that:

TFR (Total Fertility Rate) in 1995 = 5

TFR (Total Fertility Rate) in 2005 = 3

To find:

Percentage change in TFR from 1995 to 2005 = ?

Solution:

First of all, let us have a look at the formula for calculating the percentage change in any quantity.

Let p be the old value and

q be the new value.

Then percentage change is given as:

[tex]Percentage\ change = \dfrac{New\ Value - Old\ Value}{Old\ Value} \times 100[/tex]

Here, Old value is 5

New value is 3.

[tex]Percentage\ change = \dfrac{3 - 5}{5} \times 100\\\Rightarrow Percentage\ change = \dfrac{- 2}{5} \times 100\\\Rightarrow Percentage\ change = - 40\%[/tex]

Negative sign means there is a decrease of 40%.

So, Decrease in TFR of 40% is the answer.

20

Step-by-step explanation:

30-6=24-4=20 that how you find your a answer

Answer:

The value of M is 91.

Step-by-step explanation:

Suppose T represents the tens digit and U represents the units digit.

Then the numbers M and N are:

M = 10T + U

N = 10U + T

Compute the value of M - N as follows:

M - N = 10T + U - 10U - T = 9T - 9U = 9 (T - U)

Given:

M > N

⇒ T - U > 0

⇒ T > U

Also, M - N is a multiple of 9.

Since M - N is a two-digit number, the possible values of M - N are:

18, 27, 36, 45, 54, 63, and 72

The values 81, 90 and 99 would not be considered since:

9 × 9 = 81

9 × 10 = 90

9 × 11 = 99

T - U = 9 (T - U) = 9 , 10 or 11 respectively and the largest difference for T − U we can get is 9 - 0 = 9 - 0 = 9.

Even this would result in N = 9, which is not a 2-digit number.

It is provided that the integer (M - N) has 12  factors.

Of the possible values of M - N the integer with 12 factors is 72.

The factors of 72 are:

1×72

2×36

3×24

4×18

6×12

8×9

So, M - N = 72.

⇒ M - N = 9 (T - U)

        72 = 9 × 8

⇒ T - U = 8

And since T > U, the values of T and U are:

T = 9 and U = 1

We cannot use T - U = 8 - 0 = 8, because then N will be not a two-digit number.

So, M = 91 and N = 19 and their difference is 72.

Thus, the value of M is 91.

Answer:

5

Step-by-step explanation:

The number of pounds of apples that she can buy will be 5.88 pounds.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

Apples are on sale for $0.85 per pound. Darla has a $5 bill.

The number of pounds of apples that she can buy will be calculated as,

⇒ $5 / $0.82

⇒ 5.88 pounds

The number of pounds of apples that she can purchase will be 5.88 pounds.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

Answer:

7

Step-by-step explanation:

We know the decimal place is after all those zeroes. Move the decimal x places to the left, until it is located between the 2 and 8. Since it moved 7 spaces, that is how you know the power of the ten. A faster way of doing this is the power is always one less than the number of digits of the number.

Answer: 7

Step-by-step explanation:

Answer:

(C) The sum of the measures of ∠P, ∠Q, and ∠R is 180°

Step-by-step explanation:

All triangles, when their three angles are added up, gets us 180°.

This goes without saying, even with scalene triangles.

Additionally, the angles in squares add up to 360°, the angles in a pentagon add up to 540°.

Hope this helped!

Answer:

x=33

because it lies on the same side of the angle

y= 115

plz mark brainliest

180-155=65 (linear pair)

65+33+x=180 (asp)

98+x=180

x=180-98

x=82

and y...

180-82=98  linear pair

98+36+y=180 asp

134+y=180

y=180-134

y=46

Answer:

C. 4

Step-by-step explanation:

To solve, set each parenthesis equal to the opposite side (0 in this case).

(x - 4)(x - 4) = 0

x - 4 = 0

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Add 4 to both sides:

x - 4 (+4) = 0 (+4)

x = 0 + 4

x = 4

Do the same for the other parenthesis:

x - 4 = 0

x - 4 (+4) = 0 (+4)

x = 0 + 4

x = 4

C. 4 is your answer.

~

Answer:

Hey there!

(x-4)(x-4)=0

(x-4)^2=0

x-4=0

x=4

The correct answer would be C.

Let me know if this helps :)