Given that the 3rd term in an arithmetic sequence is -2 and the 7th term is -10, tell me what the 1st term in the sequence is. Explain how you know.

Answers

Answer 1

Answer:

2

Step-by-step explanation:

a₃ = -2

a₇ = -10

The nth term of an arithmetic sequence is:

a = a₁ + d (n − 1)

Therefore:

-2 = a₁ + d (3 − 1) = a₁ + 2d

-10 = a₁ + d (7 − 1) = a₁ + 6d

Subtract the equations:

8 = -4d

d = -2

Plug into either equation to find the first term.

-2 = a₁ + 2(-2)

a₁ = 2


Related Questions

express each of the following percentages as a fraction. 45%

Answers

Answer:

9/20

Step-by-step explanation:

45% can be written as

= 45/100

= 9/20

Hope it will help u..

45% = 9/20
45% can be expressed as 45/100
simplify to get 9/20

What is the sum of the solutions of the 2 equations
below?
8x = 12
2y + 10 = 22
A. 23
B. 71
7 1
C.
9
D. 10
E. 17.

Answers

8x = 12

Divide both sides by 8

x = 12/8 = 3/2

2y + 10 = 22

Subtract 10 from both sides.

2y = 12

Divide both sides by 2

y = 6

6 + 3/2 = 7 1/2

Answer:

7.5 or 7½

Step-by-step explanation:

8x÷4 = 12÷4

2x = 3

x = 3/2 = 1.5

2y + 10 = 22

2y = 12

y = 6

1.5 + 6 = 7.5 = 7½

2x = 14
Help please I am stuck how do I check this?

Answers

Answer:

x=7

Step-by-step explanation:

The Answer is (X=7)

use the base ten system and mental math to find the products. of 40x50=

Answers

Answer:

2000

Step-by-step explanation:

(4x5) x 100

Answer:

2000

Step-by-step explanation:

40 x 50 can be easily done by multiplying 4 and 5 which is 20 and adding the remaining 0's which is 2000

What is the missing number 7/8 + blank equals 1

Answers

The answer is 1/8
7/8+1/8=8/8 which equals 1

If there were 18 boys at a leadership camp, how many girls were at that leadership camp

Answers

Answer:

0

Step-by-step explanation:

12+8x10.00000000000000000

Answers

Answer:

92

Step-by-step explanation:

10.00000000000000000 is the same as just 10

so through bodmas/bidmas you know thta the multiplication ha sto be done first so 8 x 10 =80

no add the first value.

12+80=92

Here is a figure made of a circle inscribed in a square. If the area of the square is 100 m 2: (a) What is the length of each side of the square? 10 o m (b) What is the radius of the circle? m (c) What is the area of the circle? ​

Answers

Answer:

6

Step-by-step explanation:

3=6

An angle measuring 3.6 radians is drawn in standard position?
In what quadrant will the terminal side of this angle lie?
Express your answer as a Roman numeral.

Answers

Answer:

III

Step-by-step explanation: I just took the quiz

Find the prime factorization of the following number. 110

Answers

Answer:

{2, 5, 11}

Step-by-step explanation:

First, 110 = 2 * 55

Next, 55 = 5 * 11

Thus, the prime factors of 110 are {2, 5, 11}

If someone is good in theoram please help me I need help with task 3,4,5

Answers

Answer:

C²= A²+B²

Step-by-step explanation:

A) 10²=( Base)² + 6²

(Base )²= 10² - 6²:

100-36

= 64

Base = √ 64

8

B) 17² = 8² + (Height)²

(Height) ² = 17²- 8²

= 289-64

= 225

Height = √225

= 15

C) 2.5² = Base ² + 1.5 ²

Base² = 2.5 ²- 1.5²

6.25- 2.25

= 4

Base = √4

= 2

D) 41² = Base²+ 40²

Base²= 41²- 40²

1681-1600

= 81

Base = √81

=9

E)26²=Base² +10²

Base² = 26²- 10²

676-100

= 576

Base= √576

= 24

F)25²= Base²+ 7²

Base² = 25²- 7²

625- 49

=576

Base= √576

= 24

The greatest payout for a personal injury was recorded
at $163,882,660 in 1993. The car wreck actually
occurred in the year 1987. If the guilty part paid in the
year the wreck actually happened, what would have
been the equivalent payout in 1987?

Answers

Answer: $115,012,850.8

Step-by-step explanation:

given data:

cash out amount in 1993 = $163,882,660

no of years = 7

inflation adjustment carried out on the amount would yield $163,882,660. in 1993 is equal to $115,012,850.8 1987.

This is because the Annual inflation grew over this period at a pace 4.26%.

= 4.26/100 * $163,882,660

= 0.0426 * $163,882,660 * 7

= $48,869,809.21

$163882660 – $48,869,809.21

= $$115,012,850.8

What number is 10 times greater than 300?

Answers

The answer above is correct 30,000

The inequality for the given statement is 10x>300.

We need to find what number is 10 times greater than 300.

What is inequality?

In Mathematics, equations are not always about being balanced on both sides with an 'equal to' symbol. Sometimes it can be about a 'not an equal to' relationship like something is greater than the other or less than. In mathematics, inequality refers to a relationship that makes a non-equal comparison between two numbers or other mathematical expressions.

Let the unknown number be x.

Now, 10 times the number=10x

The number is 10 times greater than the 300.

That is, 10x>300

Therefore, the inequality for the given statement is 10x>300.

To learn more about inequality visit:

https://brainly.com/question/20383699.

#SPJ2

Please Answer Dis .​

Answers

Answer:

543.

Step-by-step explanation:

Add both numbers as if they were positive.

What information can be used to compare linear relationships. Explain why

Answers

Step-by-step explanation:

y=mx+b m being the highest point x being the lowest

Answer:

Linear relationships can be compared using their initial values, or y-intercepts, and their rates of change, or slopes. Initial values can tell you which relationship started with a greater value. Comparing slopes can tell you which relationship is rising or falling faster.

Step-by-step explanation:

This is the sample response.

n-6m-8 for n help! please

Answers

Answer:

n=6m+8

Step-by-step explanation:

we hav to get n by itself

so start easy and add 8 to theother side

n-6m=8 then take 6m and add it the other side

n=6m+8 and there you go

Answer:

Step-by-step explanation:

n - 6m = 8

n = 8 + 6m

Eric’s kite spool had 100 yards of string. At first, he let out 50 feet of string.Then, the kite rose for another 16 yards. How much string was left on the spool?

Answers

Answer:66

Step-by-step explanation:Eric had 100 at first minus 50 then the kite rose 16 more which equals 66

The number of yards of string left on spool is 34 yards.

Given that, Eric’s kite spool had 100 yards of string.

What is subtraction?

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

At first, he let out 50 feet of string. Then, the kite rose for another 16 yards.

Now, 50+16=66 yards

So, 100-66=34 yards

Hence, the number of yards of string left on spool is 34 yards.

Learn more about the subtraction here:

brainly.com/question/2346316.

#SPJ2

Pls Help!!! John and his mother left their house for the market simultaneously. While John's mother was walking with a speed of 15 meters per minute, it took John 3 minutes to walk to the market and back to meet his mother. How long did it take John to get to the market, if his speed was 25 meters per minute?

Answers

Answer:

It would take 2.4 minutes

Step-by-step explanation:

Time span can never be different for the same two people. Therefore in 3 minutes, John's mother would have covered a distance of 15(3) = 45 meters. Respectively John would have covered a distance of 25(3) = 75 meters in the same time.

Distance from 'starting point' to the market: 45 m + 15 m = 60 meters,

Time that John takes to return from market, and meet with his mother

=> 15 / 25 (his speed) = 0.6,

Time it takes John to get to the market: 3 - 0.6 = 2.4 minutes

Answer:

2.4 mins

2mins 24 sec

Step-by-step explanation:

what is a number in which the digit 7 is worth 70

Answers

Answer:

Tens, 70, 7x10'1

Which two expressions are equivalent?
A. 5x - 5 and 5(x - 5)
B. 5(x - 5) and 5x - 25
C. 5x - 1 and 5(x - 5)
D. 5x(x - 1) and 5x - 5

Answers

Answer:

B

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

In the table below, x represents miles traveled and y represents the cost to travel by train. Miles, x 2 5 Cost, y 8.50 15.25 22.00 31.00 8 12 What is the y-intercept of this function? 0 2.25 4.00 6.50 O 17.13​

Answers

Answer:

4.00

I just did the question

Answer:

The Answer is B. 4.00

Step-by-step explanation:

the probability of a particular digit is more than 8%. the graph represents the situation. which values are included in the solution set? check all that apply

Answers

Answer:

1 and 4

Step-by-step explanation:

ed 2020

Answer:

Option B. 1 and Option E. 4

Step-by-step explanation:

Find two consecutive even integers such that four times the first equals three times the second

Answers

Answer:

1st: 2x

2nd: 2x+2

--------

Equation:

4(2x) = 3(2x+2)

-------

8x = 6x + 6

2x = 6

x = 3

-----

1st 2x = 6

2nd: 2x+2 = 8

Step-by-step explanation:

The two consecutive even integers such that four times the first equals three times the second is 6 and 8.

What is an integer ?

An integer is a number which has no decimal part.

According to the given question we have to find two consecutive even integers such that four times the first equals three times the second.

Let, the first even integer to be x.

∴ The second integer will be (x+2).          [ As every consecutive even                                                                                    

                                                                            integers comes after 2 digits]

Now, Four times the first equals three times the second which is

4x = 3(x+2)

4x = 3x + 6.

4x - 3x = 6

x = 6.

∴ The even integer is 6 and the second integer is 8.

learn more about these type of problems here :

https://brainly.com/question/12313844

#SPJ2

Point M is the midpoint of AB. The coordinates of point A are (-6, 1) and the coordinates of M are (-3,2).
What are the coordinates of point B?
The coordinates of point B are

Answers

Answer:

Let B(a,b) be x1, y1

A(-6,1) be x2,y2

midpoint M(-3,2) be (x,y)

using midpoint formula

(x,y)= [(x1+x2)/2, (y1+y2)/2)

(-3,2) = [(a-6)/2, (b+1)/2}

comparing corresponding value

-3 = (a-6)/2                           (b+1)/2 = 2

-6= a-6                                  b+1=4

a=0                                         b=3

coordinates of B = (0,3)

Subtract. −3 2/7 − (−5/7)
Enter your answer in the box as mixed number in simplest form.
___

Answers

Answer:

-2 4/7

Step-by-step explanation:

−3 2/7 − (−5/7)

Subtracting a negative is like adding

−3 2/7 + (5/7)

Since the signs are difference we subtract and take the sign of the larger number

3 2/7 - 5/7

Borrow from the whole number

2+ 7/7 + 2/7 - 5/7

2 9/7 - 5/7

2 4/7

The sign of the larger number is negative so add the negative sign

- 2 4/7

Answer:

- 2 4/7

Step-by-step explanation:

k12

Simplify the expression. 9(3 + 2w)

Answers

Answer: 27 + 18w

9 x 3 + 9 x 2w

When you SWITCH the HYPOTHESIS and the CONCLUSION you create the _________ statement.

Answers

Answer:

CONVERSE

Step-by-step explanation:

When you switch hypothesis and conclusion you are creating what is called the CONVERSE statement.

Please help me ASAP!!!

Answers

Solution:

[tex] \huge \purple {\tt {{ (\frac{49}{64}) }^{ \frac{1}{2} } = \sqrt[2]{ \frac{49}{64} } = \frac{7}{8}}} [/tex]

Answer:

[tex] \huge \pink {\tt {\frac{7}{8}}} [/tex]

Answer:

[tex] \boxed{ \bold{ \huge{ \sf{ \frac{7}{8}}}}} [/tex]

Step-by-step explanation:

[tex] \star \tt{ \: \: ( \frac{49}{64} ) ^{ \frac{1}{2} } }[/tex]

[tex] \hookrightarrow{ \tt{( \frac{7 \times 7}{8 \times 8} ) ^{ \frac{1}{2} } }}[/tex]

[tex] \hookrightarrow{ \tt{ {( \frac{ {7}^{2} }{ {8}^{2} }) }^{2} }}[/tex]

[tex] \hookrightarrow{ \tt{ { (\frac{7}{8} )}^{2 \times \frac{1}{2} } }}[/tex]

[tex] \hookrightarrow{ \tt{( \frac{7}{8} ) ^{ \cancel{2} \times \frac{1}{ \cancel{2} } } }}[/tex]

[tex] \hookrightarrow{ \tt{( \frac{7}{8} )}}[/tex]

Hope I helped!

Best regards! :D

~TheAnimeGirl

find the indicated unknown angle measure.​

Answers

Answer:

138 degrees

Step-by-step explanation:

Angle b and the 42 degree angle right next to it are supplementary angles. That means that 42+b=180

b=138

Aretailer is having a promotional sale for 35% off all items. There is a 7% sales tax added to the price. Which
represents the situation, where x is the original cost of the item(s)?

Answers

Answer:

.65x(1.07) = 0.6955x

Step-by-step explanation:

Other Questions
What organelle breaks down food particles and waste in the animal cell? Who was the leader of the Roman Catholic Church? CHow did Gibbons v. Ogden expand the idea of federal supremacy?It said that federal judicial review is required in all state legal cases.It said the Constitution is open to interpretation in state matters.O It said that federal trade is more important than state trade.O It said that Congress has power to regulate trade between states. 5n +5y+5n+6a+2dCan You intelligent people please help me with this Please help me answerrr a document or image that was created after an event happened Match question it has 3 answers Im giving brainly Islamic trade routes would have beenMOST likely to have been found inA.North AfricaB.Central EuropeC.East Asia Which characteristic of neoclassical poetry is displayed in this excerpt from the poem Goliath of Gath by Phillis Wheatley?Ye martial pow'rs, and all ye tuneful nine,Inspire my song, and aid my high design.The dreadful scenes and toils of war I write,The ardent warriors, and the fields of fight:You best remember, and you best can singThe acts of heroes to the vocal string:A. a reference to heroesB. heroic coupletsC. rhyming verseD. a turbulent theme 2. How does the author show that the Cyclops fits the definition of monstrous? What kind of things would Physics be able to answer? I. How does a hair dryer work? II. How does a lightning bolt form? III. How far will a cannon ball fly through the air? IV. What happens to a person after they die? I and III I, II, and III I only I, II, IV Which of the following is equal to an impulse of 18 units?O A. Force = 10, time = 2B. Force = 0.1, time = 18O C. Force = 6, time = 3OD. Force = 7, time = 3 Penelope earned $50 in May. She earned $60 in June.What is the percent increase or decrease in Penelope's monthly earnings Entrepreneurship can be very challenging. Which is not a typical challenge of being an entrepreneur? How does the American legal system protect us from arbitrary actions? List and explain at least 2 of Cardinal Richelieus 4 points and explain their importance to France? (Site 2) Which are examples of a person changing careers? Check all that apply.a home insurance salesman decides to start selling home warranties insteada farmer decides to start practicing real estate and selling local landa biology teacher moves to teach the elective cooking classes for that school yearO a factory worker who manufactures linens moves to a new factory that manufactures pencilO a crab fisherman decides to start a business maintaining local boats Evaluate f(x)=-2+5 for f(-5) Tonya plans to join a fitness club. She researched the costs to join different clubs in her area and found that there is a linear relationship between the total cost of belonging to a club and the number of months that you are a member. Each club charges monthly dues, and some clubs require new members to also pay a one-time membership fee. The total costs of being a member for 6 months, 12 months, and 24 months at each of three clubs are shown in the table.Total Cost of Fitness Club MembershipLength of membershipClub 1Club 2Club 36 months$108$120$12612 months$216$210$25224 months$432$390$504How many of the clubs require new members to pay a one-time membership fee?A: 0B: 1C: 2D: 3 What information does a distance time graph provide