Find an expression for the number in the nth term pattern of the sequence.
4 , 7 , 12, 19

Answers

Answer 1

Answer:

n^2 + 3.

Step-by-step explanation:

4 7 12 19

Differences are 3 5 7   so this a quadratic sequence.

2nd difference = 2 2

So the first part of the expression is n^2

Terms:  4  7  12  19

n^2       1    4   9  16

Difference = 3 3 3 3 3

So the answer is n^2 + 3.


Related Questions

Rearrange 4x+2y=8 to make y the subject.

Answers

Step-by-step explanation:

y=(8-4x)/2

y=4-2x

I hope it helps

Answer:

y = 4 - 2x

Step-by-step explanation:

4x + 2y = 8

Subtract 4x on both sides,

2y = 8 - 4x

Divide 2 on both sides,

y = ( 8 - 4x ) / 2

y = 4 - 2x

You work as an office administrator and are paid $18.65 per hour and work 80 hours in 2 weeks. How much is your straight time pay?

Answers

Given↷Amount paid per hour ⇢$18.65Working hour in 2 weeks⇢80To find ↷The straight time payAnswer$1,492

Solution ↷

To find the straight time pay for two weeks,

we'll multiply the amount per hour to the number of working hours

hence,

Straight time pay ⇢$18.65 x 80Straight time pay⇢$ 1,492

___________________________________

The Straight time pay of one week would be ,

⇢40 x $18.65⇢$746

___________________________________

Straight time pay of a month would be,

⇢160 x $18.65⇢$2,984

___________________________________

Paid amount per hour=$18.65Total hours=80

Weeks no is not of any use here

Straight time pay:-

18.65×80$1492

what is the area when the diameter is 94cm

Answers

Answer:

see below

Step-by-step explanation:

Area = pi r^2     r = radius

  diamter = 94    then radius = 94/2 = 47 cm

area = pi (47)^2 = 2209 pi    or 6939.78  cm^2

Answer:

A ≈ 6,939.8 cm²

Step-by-step explanation:

Given : " the diameter is 94cm "

d = 94

Radius is r = d/2 = 94/2 = 47 cm

Area of a circle is

A= π·r²

A = π·47² ≈ 6,939.8 cm²

Simplify each of the expressions below. Which of the expressions have a value between 20 and 40? Select all that apply.
A)(6 −3)2+(5×3)
B)72 −(1×3)3
C)43 −5×8
D)102 −(5+2)2

Answers

Answer:

d

Step-by-step explanation:

Plot and connect the points A(-4, 5), B(2, -4), C(-4, -4), and find the area of the triangle formed.

Answers

Answer:

i think this is the answer

need help with question 8

Answers

Answer:

Asnwer is in explanation

Step-by-step explanation:

f' (x) = 2x

Hope this helps!

how would i find the volume??

Answers

1/3(base area)(height)

base area= 22.1*14=154.7

1/3(154.7)(19)= 979.77

Suppose you own a home worth $185,325 and your property tax is 1.5%. How much are you liable to pay at the end of the year?

Answers

Answer:

$ 2779.88

Step-by-step explanation:

185 325  x  1.5 % =

185 325 x  .015 = 2779.88

The population of bacteria in a colony is increasing. The number of bacteria at time t
(in hours) is given by
P= 3000 x 1.15t
a)By what percentage is the number of bacteria increasing each hour?

b) What was the size of the population when t = 0?

C)What will be the size of the population after 24 hours?
Give your answer to a sensible degree of accuracy.

Step by step explanation please. <3

Answers

Step-by-step explanation:

a) if the population is 3000 and it is being multiplied 1.15 than it is 15%. I found this by multiplying 1.15 by 100 to make it percent than anything over 100 is an increase.

b)im not so sure on this one but I think if t = 0 than it would be p= 3000 x 1.15 x0 which would equal 0

c) p = 3000x 1.15 x 24 p = 82,800

The three sides of a triangle are (x+5)cm ,(2x+4)cm and (2x-3)cm .
a.find the perimeter of the triangle
b. if x =10, find the perimeter of the traingle.

Answers

Hey ! there

Answer:

a. Perimeter = ( 5x + 6 ) cm

b. Perimeter when x is equal to 10 = 56 cm

Step-by-step explanation:

In this question we are given with three sides of a triangle that are as follows ,

( x + 5 ) cm

( 2x + 4 ) cm

( 2x - 3 ) cm

And we are asked to :

a. find perimeter of triangle.

b. find perimeter if x is equal to 10 .

We know that for finding perimeter of any shape we must have to add all the sides of the shape or ,

[tex] \qquad \: \underline{\boxed{\frak{Perimeter = Sum \: of \: all \: sides}}}[/tex]

Solution : -

( a )

Now adding all the three sides of triangle to find the perimeter .

[tex] \hookrightarrow \quad \: ( x + 5 ) + ( 2 x + 4 ) + ( 2x - 3 ) [/tex]

[tex] \hookrightarrow \quad \: \: x + 5 + 2x + 4 + 2x - 3[/tex]

Combining like terms :

[tex] \hookrightarrow \quad \:x + 2x + 2x + 5 + 4 - 3[/tex]

Now , solving :

[tex] \hookrightarrow \quad \: \red{\underline{ \boxed{ \frak{(5x + 6) \: cm}}}}[/tex]

Therefore , perimeter of triangle is 5x + 6 centimetres .

( b )

Now , we are finding perimeter of triangle when value of x is 10 . So substituting value of x in given sides of triangle ,

First Side :

x + 5

10 + 5

15 cm

Second Side :

2x + 4

2 ( 10 ) + 4

20 + 4

24 cm

Third Side :

2x - 3

2 ( 10 ) - 3

20 - 3

17

So , all the sides are 15 cm , 24 cm and 17 cm .

Now , adding all these to find perimeter .

[tex] \hookrightarrow \qquad \: 15 + 24 + 17[/tex]

[tex]\hookrightarrow \qquad \: 39 + 17[/tex]

[tex]\hookrightarrow \qquad \: \red{\underline{\boxed{\frak{56 \: cm}}}}[/tex]

Therefore , perimeter of triangle when value of x is 10 cm is 56 cm .

Alternative Solution : -

As above we have find the perimeter of triangle in term of x that is ( 5x + 6 ) cm. So we can put value of x as 10 in this to get perimeter. So ,

5x + 6

5 ( 10 ) + 6

50 + 6

56 cm

Therefore, perimeter of triangle is 56 cm .

#Keep Learning
Given ↓The three sides of the triangle : (x+5), (2x+4) and (2x-3)

To Find ↓ The perimeter of the triangleCalculations ↓

To find the perimeter of a shape, we should add all sides , like so :

x+5+2x+4+2x-3

Combine the x's :

x+2x+2x+5+4-3

x+4x+9-3

5x+6

Perimeter :

5x+6 cm

º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º º

b.

Find the perimeter of the triangle if x = 10

Just write 10 instead of x :

5(10)+6

5(10) simplifies to 50 ↓

50+6

56

Perimeter of the triangle when x = 10 : 56 cm

hope helpful ~

3x−45=−12
What is the value of x?

Answers

Answer:

x=11

Step-by-step explanation:

3x−45=−12

Add 45 to each side

3x−45+45=−12+45

3x = 33

Divide each side by 3

3x/3 = 33/3

x=11

The value of x would be 11.

3/4x= 12, what must x be?

x=16
x=4
x=3
x=48

Answers

Answer:

x=16

Step-by-step explanation:

12 is three fourths of x, there are three 1/4s that make up 12.

Divide 12 by three to find out 1/4 is.

Then simply multiply that by four.

(10/2) / 3 = 10/ (2/3)
O A. True
O B. False

Answers

Answer:

It is False

Step-by-step explanation:

The answer is not the same.

Suppose you carry out a significance test of h0: μ = 8 versus ha: μ > 8 based on sample size n = 25 and obtain t = 2. 15. Find the p-value for this test. What conclusion can you draw at the 5% significance level? explain.

a the p-value is 0. 2. We reject h0 at the 5% significance level because the p-value 0. 02 is less than 0. 5.
b the p-value is 0. 2. We fail to reject h0 at the 5% significance level because the p-value 0. 02 is less than 0. 5.
c the p-value is 0. 48. We reject h0 at the 5% significance level because the p-value 0. 48 is greater than 0. 5.
d the p-value is 0. 48. We fail to reject h0 at the 5% significance level because the p-value 0. 48 is greater than 0. 5.
e the p-value is 0. 52. We fail to reject h0 at the 5% significance level because the p-value 0. 52 is greater than 0. 5

Answers

Using a t-distribution calculator and finding the p-value, the correct option regarding the conclusion is given by:

a) the p-value is 0.02. We reject h0 at the 5% significance level because the p-value 0.02 is less than 0.05.

What is the relation between the p-value and the conclusion?

It also involves the significance level, as follows.

If the p-value is less than the significance level, we reject the null hypothesis [tex]h_0[/tex].If it is more, we do not reject.

In this problem, a t-distribution calculator for a right-tailed  with t = 2.15 and 25 - 1 = 24 df is used to find a p-value of 0.02.

It is less than 0.05, hence option a is correct.

More can be learned about p-values at https://brainly.com/question/26454209

giving brainliest, thanks in advance!!

Answers

Now get the square root of 30

Can anyone help with Discriminants in math??
(“number and types of solutions” is what the rest says)

Answers

#1

3x²-3x+2

D:-

b²-4ac(-3)²-4(3)(2)9-24-15

D<0 so unequal and un real roots

#2

b²-4ac(-10)²-4(1)(1)100-496

D>0 so unequal and real roots

#3

(-4)²-4(4)(1)16-160

Equal and real roots

Answer:

Discriminant

[tex]b^2-4ac\quad\textsf{when}\:ax^2+bx+c=0[/tex]

[tex]\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real solutions}[/tex]

[tex]\textsf{when }\:b^2-4ac=0 \implies \textsf{one real solution}[/tex]

[tex]\textsf{when }\:b^2-4ac < 0 \implies \textsf{no real solutions}[/tex]

------------------------------------------------------------------------------------------------

Question 5

Given function:  [tex]f(x)=3x^2-3x+2[/tex]

[tex]\implies a=3, \quad b=-3, \quad c=2[/tex]

Inputting these values into the discriminant:

[tex]\implies \textsf{discriminant}= (-3)^2-4(3)(2)=-15[/tex]

As -15 < 0 there are no real solutions

------------------------------------------------------------------------------------------------

Question 6

Given function:  [tex]f(x)=x^2-10x+1[/tex]

[tex]\implies a=1, \quad b=-10, \quad c=1[/tex]

Inputting these values into the discriminant:

[tex]\implies \textsf{discriminant}= (-10)^2-4(1)(1)=96[/tex]

As 96 > 0 there are two real solutions

at [tex]x=5 \pm 2\sqrt{6}[/tex]

------------------------------------------------------------------------------------------------

Question 7

Given function:  [tex]f(x)=x^2-4x+4[/tex]

[tex]\implies a=1, \quad b=-4, \quad c=4[/tex]

Inputting these values into the discriminant:

[tex]\implies \textsf{discriminant}= (-4)^2-4(1)(4)=0[/tex]

As 0 = 0 there is one real solution

at [tex]x=2[/tex]

brelynn has a piece of ribbon that is 3/4 yard long. how many 1/12 yard pieces can she cut? help

Answers

The Brelynn can cut 9 pieces from the piece of ribbon that is 3/4 yard long of 1/12 yard.

What is a fraction?

Fraction number consists of two parts one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.

Let's assume Brelynn can cut x pieces from the piece of ribbon that is 3/4 yard long.

So from the problem:

[tex]\rm \frac{\frac{3}{4} }{x} = \frac{1}{12}[/tex]

[tex]\rm \dfrac{3}{4} = \dfrac{x}{12}[/tex]

x = 9 pieces

Thus, the Brelynn can cut 9 pieces from the piece of ribbon that is 3/4 yard long of 1/12 yard.

Learn more about the fraction here:

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Ruby is making a punch. for every 3/4 cups of juice, ruby adds 1/2 cups of soda. Enter the number of cups of juice will ruby add for one cup of soda.?

Answers

Answer:

She would need 6/4 or 1 1/2 cups juice

Step-by-step explanation:

Answer:

1.5 cups of juice.

Step-by-step explanation:

1 / 0.5 = 2

0.75 x 2 = 1.5

The equation of a circle is shown. What is the radius? 22 + y2 - 10x + 8y + 16 = 0​

Answers

Answer:

radius = 5

Step-by-step explanation:

Given

x² + y² - 10x + 8y + 16 = 0

Using completing the square method

x² - 10x + 25 - 25 + y² + 8y + 16 (x + 5)² + (y + 4)² - 25 = 0(x + 5)² + (y + 4)² = 25

Standard form for equation of a circle

(x - h)² + (y - k)² = r², where r is the radius

On comparison to our equation in the question :

r² = 25radius = 5 [as distances cannot be -ve]

Answer:

radius = 5

Step-by-step explanation:

Question

[tex]x^2+y^2-10x+8y+16=0[/tex]

The equation of a circle is shown. What is the radius?

----------------------------------------------------------------------------------

Equation of a circle

[tex](x-a)^2+(y-b)^2=r^2[/tex]

(where (a, b) is the center and r is the radius)

Given equation:

[tex]x^2+y^2-10x+8y+16=0[/tex]

Collect like terms:

[tex]\implies x^2-10x+y^2+8y+16=0[/tex]

Subtract 16 from both sides:

[tex]\implies x^2-10x+y^2+8y=-16[/tex]

Complete the square for both variables.

Add 25 to both sides for x.  Add 16 to both sides for y.

[tex]\implies x^2-10x+25+y^2+8y+16=-16+25+16[/tex]

[tex]\implies (x^2-10x+25)+(y^2+8y+16)=25[/tex]

Factor the two variables:

[tex]\implies (x-5)^2+(y+4)^2=25[/tex]

Therefore:

center of the circle = (5, -4)radius of the circle = √25 = 5

She calculates two regression models. which is true? the linear model better represents the situation because the amount she owes is decreasing by about the same amount every 6 months. the linear model better represents the situation because according to the exponential model, the repayment amount will never be 0. the exponential model better represents the situation because the amount she owes decreases by about the same amount every 6 months. the exponential model better represents the situation because according to the linear model, the repayment amount will eventually be negative.

Answers

The answer is A.thus, this is a linear model. To check,you can see visually that the points are more fitted to the line than the curve.

What is linear regression?

Linear regression is the most basic and commonly used predictive analysis. Regression estimates are used to describe data and to explain the relationship.

The difference between the linear model and the exponential model is the degree of difference of consecutive points. If their difference is constant, then it is more appropriate for the linear model. If their difference is increasing at a very fast rate, then that follows an exponential model. With that being said, let's look at the differences at every 6 month-intervals.

2700-2110 = 590

2110-1500 = 610

1500-870 = 630

870-220 = 650

Their differences are about the same having a mean of 620. Thus, this is a linear model. To check,you can see visually that the points are more fitted to the line than the curve. The answer is A.

To know more about Linear regression follow

https://brainly.com/question/25987747

Answer:

A is the correct answer

Step-by-step explanation:

please help asap!! i don't really understand this

Answers

Answer:

17*12 area of triangle is base*height

Answer:

Use the formula for the area of a triangle:

A = BH x 1/2

Where 'B' represents the base, 'H' the height, and multiplying by 1/2 just means dividing the product of those two lengths by 2.

What we know:

Base = 12 feetHeight = 17 feet

Which is all we need to know, so plug these values into our formula;

A = BH x 1/2

A = 12(17) x 1/2

Now just solve:-

A = 204 x 1/2

A = 204/2

A = 102, the area of this triangle is 102 ft²!

1)
W
K
V
A) 20.8
C) 11
22.2
?
11
U
J
T
B) 16.6
D) 18

Answers

Answer:

1. A commercial air carrier determines that the maximum angle of depression of a plane descending to an airport is 11°. Determine horizontal distances

Step-by-step explanation:


Emily is working with rolling a standard number cube (die) and flipping a quarter.
Which experiment can yield a 50% probability?

Answers

Answer:

flipping a quarter

Step-by-step explanation:

a quarter has two sides so the chance of getting one is 1/2

a dice has 6 sides so the chance of getting a certain number is 1/6

Determine the SURFACE AREA of the 3-D figure below. (Rectangular Prism + Pyramid)
Round answer to the nearest hundredth (if necessary).
Fin
2.5 cm
3 cm
3 cm
3 cm
3 cm
3 cm

Answers

the surface area is 60

please help im not good with area and circumference when it comes to circles​

Answers

Note: the diameter is always twice as much the radius

1) r = 13cm
2) d = 27.2in
3) d = 24x
4) r = 24.5m

5) There is a circle inside a square, so the side of the square (16in), corresponds to the diameter of the circle.
radius = 8in
area = (pi)r^2 = 3.14 (8in)^2 = 3.14 (64in^2) = 200.96in^2
Circumference = 2(pi)r = 2(3.14)8in = 50.24in

6) The hypotenuse of the right triangle inside the circle is equal to the diameter of the circle. So we need to find it using the Pythagorean theorem.
d^2 = (10^2 + 24^2)cm
d^2 = (100 + 576)cm
d^2 = (676)cm
d = 26cm
So, radius = 13cm
Area = (pi)r^2 = 3.14 (13cm)^2 = 3.14 (169cm^2) = 530.66cm^2
Circumference = 2(pi)r = 2(3.14)(13cm) = 81.64cm

7) The diagonal of the square is equal to the diameter of the circle, so we need to find it using a formula.
d =[sqrt(2)] (5in)
I won’t calculate it now, because it’s a periodic number.
r = {[sqrt(2)] (5in)} : 2
Area = (pi)r^2 = 3.14 {[sqrt(2)(5in)]:2}^2 = 3.14 (12.5in^2)= 39.25in^2
Circumference = 2(pi)r = 2(3.14)(12.5in) = 78.5in

8) If a right triangle has two equal sides, it means that it is half of a square.
So we can apply the same formula as before.
d =[sqrt(2)] (8)
I won’t calculate it now, because it’s a periodic number.
r = {[sqrt(2)](8)}:2
Area = (pi)r^2 = 3.14 {[sqrt(2)(8)]:2}^2 = 3.14 (32) = 100.48
Circumference = 2(pi)r = 2(3.14)(32) = 200.86
{there aren’t units of measurement in this exercise}

I hope there are no accidental errors. :)

The mean of five numbers is 8. If one of the five numbers is removed, the mean becomes 9. What is the value of the number that was removed

Answers

Using the mean concept, it is found that the value of the number that was removed was of 4.

What is the mean?

The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.

The mean of five numbers is 8, hence, the sum of the numbers is given by:

S = 5 x 8 = 40.

If one of the five numbers is removed, the mean becomes 9, hence, the sum of the four numbers is given by:

S = 4 x 9 = 36.

The difference is:

40 - 36 = 4.

Hence, the value of the number that was removed was of 4.

More can be learned about the mean concept at https://brainly.com/question/25122507

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HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP

Answers

Answer:

3/4

Step-by-step explanation:

If Ty and his brothers share a pizza equally, then the pizza is split into four parts because there are four people sharing it. That means that each person has 1/4 of the pizza.

Since Ty has 3 brothers, they share 3/4 of the pizza since 1/4 * 3 = 3/4.

Let x = 0.147 and let y = 0.147

Answers

The value of y will be more as the number is repetitive, and both x and y initial three digits after the decimal are the same.

What is a rational number?

A rational number is one that has the form p/q, where p and q are integers and q is greater than zero. Some rational number examples are 1/3, 2/4, 1/5, 9/3, and so on.

The complete question is, Let x = 0.147 and let y = [tex]0.\overline{147}[/tex].  Is x a rational number? Is ya rational number? Which is larger, x or y?

Given the value of x is 0.147. As it can be written in the form of a fraction,

[tex]0.147 = \dfrac{147}{1000}[/tex], we can conclude that x is a rational number.

The value of y = [tex]0.\overline{147}[/tex] can also be written in the form of a fraction,

[tex]0.\overline{147} = \dfrac{147}{999}[/tex], therefore, we can conclude that y is also a rational number.

The value of y will be more as the number is repetitive, and both x and y initial three digits after the decimal are the same.

Learn more about Rational Numbers:

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there are 10 apples for every 6 bananas how many bananas are there if there are 20 apples?

What if there are 15 apples?

Answers

If there are 10 apples for every 6 bananas, then there would be 12 bananas if there are 20 apples & 9 bananas if there are 15 apples.

Its worth 20 points but i need it within 10 minutes or less!

Answers

A, C, D are all correct
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