the nth term of a sequence is 20-n^2
a) find the third term of the sequence
b) which term in the sequence is the first to have a negative value ​

Answers

Answer 1

Answer:

a) 20 - 3^2 = 11

b) 5th, 20 - 5^2 = -5

Step-by-step explanation:

The answer assumes your terms begin at 1. If the terms begin at zero

a) 16

b) 6th term

if you chose to be extremely technical you would take the square root of 20.1 or 20.00000009 but I'm assuming they want whole numbers

Answer 2

Answer:

a)11

b)5th term

Step-by-step explanation:


Related Questions

The volume of a box is 4 in. wide, 2 in high and 5 in. long is

Answers

Answer:

40 in^3

Step-by-step explanation:

Volume of a box is given by

V = l*w*h

V = 4*2*5

   = 40 in^3

A bus holds 30 people, and a van holds 10 people. Write an expression that shows the number of people that could fill b buses and v vans?

Answers

Answer:

30b+10v

Step-by-step explanation:

6 times the sum of 12 and 8. Write your answer with no spaces. *

Answers

Answer:

(12+8)x6=120

(>'-'<)

True correct answer

Please help!
Are the expressions –0.5(3x + 5) and
–1.5x + 2.5 equivalent? Explain why or why not.

Answers

Answer:

We can check this two ways: distributing the -0.5, and plugging in a number for x.

First, we can check this by distributing the -0.5.  Our equation becomes:

-1.5x -2.5 = -1.5x + 2.5

Clearly, this is not true.  We can show this one more time by plugging in a number for x.  I will use 2.

Now, we evaluate both sides and see if they are equal.

-3 - 2.5 = -3 + 2.5

-5.5 = 0.5

Clearly, this is not true.  These expressions are not equivalent.

Step-by-step explanation:

Answer:

Step-by-step explanation:   Using the distributive property to expand the first expression, you would get -1.5x - 2.5. Since the constant term does not have the same sign as the second expression, the two expressions are not equivalent. Also, if you substitute in a value for x and evaluate each expression, the values will not be equal.

Write an equation in slope intercept form that passes through the point (3,9) and has a slope of -5
Group of answer choices

1.y = -5x - 24
2.y = 5x + 6
3.y = 5x - 6
4.y = -5x + 24

Answers

Answer:

The answer is y = -5x + 24

Step-by-step explanation:

To find an equation of a line when given the slope and a point we use the formula

[tex]y - y_1 = m(x - x_1)[/tex]

where

m is the slope

( x1 , y1) is the point

From the question we have

[tex]y - 9 = - 5(x - 3) \\ y - 9 = - 5x + 15 \\ y = - 5x + 15 + 9[/tex]

We have the final answer as

y = - 5x + 24

Hope this helps you

A train travelled a distance of 1350 kilometers in 15 hours find it,s average speed answer pleaseeeeeeeee fast ,thanks​

Answers

Answer:

90

Step-by-step explanation:

1350 divided by 15

Sam is investing his money. He thinks that he should make $8 for every $100 he invests. How much does he expect to make on an investment of $1500?

Answers

Answer:

$120

Step-by-step explanation:

Happy almost halloween!

Two feet is what percent of one yard?​

Answers

Answer:

Step-by-step explanation:

there are three feet in one yard

if you have 2 feet that is 2/3 of a yard

2/3 x 100 = 66.67% or 66.6666666666% repeated if you dont want it rounded.

Answer:

About 66.67%

Step-by-step explanation:

Since 1 yard is 3 ft. we can say 3 ft. is 100%

By this statement we can also say that 1 ft. is about 33.34%

This means that 2 ft. is 66.67%

Hope this Helps!!! :)

Let me know if I should change anything or if it was perfect!

...................................

Answers

Answer:

What? lol

Step-by-step explanation:

Answer:

........................?

Step-by-step explanation:

5. Ed, an employee of the Natural Color Company, suffered from a rare disease that was very expensive to treat. The local media ran several stories about Ed’s problems, and the family created a website that generated more than $10,000 in gifts from individuals to help pay the medical bills. Ed’s employer provided hospital and medical insurance for its employees, but the policy did not cover Ed’s illness. When it became apparent that Ed could not pay all of his medical expenses, the hospital canceled the $25,000 Ed owed at the time of his death. After Ed’s death, his former employer paid Ed’s widow $12,000 in "her time of need." Ed’s widow also collected $50,000 on a group term life insurance policy paid for by Ed’s employer. What are Ed’s and his widow’s gross income?

Answers

Answer:

$0

Step-by-step explanation:

The $10,000 that Ed's family received as gifts from individuals to help them pay the hospital bill are not included as part of their gross income.

Generally debt cancellations are taxable, except when they are made out of "detached and disinterested generosity", i.e. debt is cancelled for humane reasons and not business reasons. I believe that the $25,000 debt that was cancelled by the hospital fits into the definition of disinterested generosity, therefore, the $25,000 are considered a gift and are not taxable.

Under section 102, money given by an employer to an employee's widow may be considered a gift and is not taxable. If the payment is made due to a special circumstance and not in recognition of previous work done, then it is a gift. I also believe that the family can argue that this money is a gift since Ed died of a rare disease that left them almost bankrupt.

Life insurance proceeds are not taxable.

P1=(-1,3) and P2=(5,-1)

Find the distance from p1 to P2

Answers

Answer:

7.21

Step-by-step explanation:

Given that:

P1=(-1,3) and P2=(5,-1)

Distance between two points :

d = Sqrt[(x2 - x1)² + (y2 - y1)²]

x1 = - 1 ; y1 = 3

x2 = 5 ; y2 = - 1

d = Sqrt[(5 - (-1))² + ((-1) - 3)²]

d = Sqrt[(5 + 1)² + (-1 - 3)²]

d = sqrt[(6)^2 + (-4)^2]

d = sqrt(36 + 16)

d = sqrt(52)

d = 7.21

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Answers

Answer:

24

Step-by-step explanation:

Answer:

R is D

Step-by-step explanation:

Mathematical Expression:

R=D divided by T

For Y=R substitute R with RT:

R=D

You measure the period of a mass oscillating on a vertical spring ten times as follows:

Period (s): 1.06, 1.31, 1.28, 0.99, 1.48, 1.37, 0.98, 1.31, 1.59, 1.55

Required:
What are the mean and (sample) standard deviation?

a. Mean: 1.228, Standard Deviation: 0.2135
b. Mean: 1.325, Standard Deviation: 0.1674
c. Mean: 1.292. Standard Deviation: 0.2211
d. Mean: 1.228, Standard Deviation: 0.2098
e. Mean: 1.292, Standard Deviation: 0.2135

Answers

Answer:

Step-by-step explanation:

Mean is the ratio of sum of the dataset to the sample size. Mathematically:

[tex]\overline x = \frac{\sum Xi}{N}[/tex]

Xi are the individual periods

N is the sample size

[tex]\sum Xi = 1.06+1.31+1.28+0.99+1.48+1.37+0.98+1.31+1.59+1.55\\\sum Xi = 12.92[/tex]

N = 10

Substitute

[tex]\overline x = \frac{12.92}{10}\\\overline x = 1.292[/tex]

hence the mean of the samples is 1.292

For the standard deviation:

[tex]\sigma = \sqrt{\frac{\sum (x-\overline x)^2}{N} } \\[/tex]

[tex]\sum (x-\overline x)^2 = (1.06-1.292)^2+ (1.31-1.292)^2+ (1.28-1.292)^2+ (10.99-1.292)^2+ (1.48-1.292)^2+ (1.37-1.292)^2+ (0.98-1.292)^2+ (1.31-1.292)^2+ (1.59-1.292)^2+ (1.55-1.292)^2\\\sum (x-\overline x)^2 = 0.43996[/tex]

Substitute into the formula:

[tex]\sigma = \sqrt{\frac{0.43996}{10} }} \\\sigma = \sqrt{{0.043996}}} \\\sigma = 0.2098[/tex]

Hence the standard deviation is 0.2098

mathematics help me tx6d6x66ds7cv7f7f77f ui fudidificd 7dyfllxu cub I Jim burgundy gehrig giving​

Answers

Answer:

help u with what u didnt attach anything

Step-by-step explanation:

joe wanted to take the train, it cost 2 cents for one ticket, joe has 4 cents, how many cents will joe have to take away to get a ticket?​

Answers

Answer:

Joe will have to take away 2 cents to get the ticket.

2 cents boyyyyyyyyy I think I’m right idk

Which set of numbers is closed under subtraction? *
Natural numbers
Integers
Irrational numbers
Odd numbers

Answers

Answer:

irrational numbers

Step-by-step explanation:

Which of the following equations is equivalent to 30 = 2 ( -2x + 6

Answers

Answer:

30=-4x+12

Step-by-step explanation:

they both equal -9/2

Hey guys I need help. Care to be kind? :(

Answers

9514 1404 393

Answer:

  $77.94

Step-by-step explanation:

The (signed) sum of charges and credits results in the total due:

  $82.04 -4.10 = $77.94 . . . amount due

PLEASE HELP QUICK WILL GIVE BRAINLIEST

Answers

Answer:

2 x intercepts

Step-by-step explanation:

math go brrr

Answer: the asnwer is three

Step-by-step explanation: well theres your answer

Please help please ​

Answers

Answer:

1.) supplementary  m<1+m<2=180 and m<2+m<3=180

2.) congruent, supplementary

Step-by-step explanation:

the answers are in this order above

What is the solution to the following question 2^ -3x+2=0

Answers

Answer: x= −16

Step-by-step explanation:

Low‑density lipoprotein, or LDL, is the main source of cholesterol buildup and blockage in the arteries. This is why LDL is known as "bad cholesterol." LDL is measured in milligrams per deciliter of blood, or mg/dL. In a population of adults at risk for cardiovascular problems, the distribution of LDL levels is normal, with a mean of 123 mg/dL and a standard deviation of 41 mg/dL. If an individual's LDL is at least 1 standard deviation or more above the mean, he or she will be monitored carefully by a doctor. What percentage of individuals from this population will have LDL levels 1 or more standard deviations above the mean?

Answers

Answer:

The percentage of individuals from this population will have LDL levels 1 or more standard deviations above the mean is 16%.

Step-by-step explanation:

Let X represent the LDL levels.

It is provided that [tex]X\sim N(123, 41^{2})[/tex].

Compute the probability that a randomly selected individual is will have LDL levels 1 or more standard deviations above the mean as follows:

[tex]P(X\geq \mu+\sigma)=P(X\geq 123+41)[/tex]

                      [tex]=P(X\geq 164)\\\\=P(\frac{X-\mu}{\sigma}\geq \frac{164-123}{41})\\\\=P(Z>1)\\\\=1-P(Z<1)\\\\=1-0.84134\\\\=0.15866\\\\\approx 0.16[/tex]

Thus, the percentage of individuals from this population will have LDL levels 1 or more standard deviations above the mean is 16%.

The value of y is directly proportional to value of x.if y =35 when x=140 what is the value of y when x = 70​

Answers

Answer:

try 77

Step-by-step explanation:

The living room of Ann's house is a square with an area of 121 square feet. What is the length of each side of the foyer

Answers

Answer:

30.25

Step-by-step explanation:

121 divided by 4 is 30.25

How much dirt is in a hole that is 36 inches long, 2 yards wide , and 6 feet deep ?

Answers

Answer:

96 feet cubed

Step-by-step explanation:

I think it's right. 36 inches to feet, 2 yards to feet, 6 feet

3*6*6

96 I think

f(x) = (2x² – 3)^(-2a? – 9)11

Answers

Answer:

-44ax^2-198x^2+66a+297

Step-by-step explanation:

there

question 6 i mark as brainliest ​

Answers

last awnser is the awnser

Answer:

the product of the sum is 5 39/40

Which operation would you do third in the following problem?
A. Subtraction
B. Multiplication
C. Division
D. Addition

Answers

Answer:

I believe it is C. division

pretty sure it is division

What is the answer to this rebus

Answers

Answer:

rank

Step-by-step explanation:

I want the answer of this question

Answers

Answer:

42sq . units

Step-by-step explanation:

To get the width of the shaded rectangle, subtract 2(0.5) from the length of the other rectangle bounding it ( 7cm).

Multiply the length and width together to get the area .

Answer: 42 sq. Units

Step-by-step explanation: i got it right.

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