Let Sn, be the sum of the first n terms of the arithmetic series 2+4+6+....
(a)
Find
(i)
S4
(ii) S100

Answer: 10 100
How do you work it out though?​

Answers

Answer 1
i) 20
ii) 19900

formula : sn = n/2[2a+(n-1)d ]

Related Questions

Pls help for final!!! I put picture

Answers

Answer:

maybe option no C is correct .

I did in my copy and ans was 5 .

Step-by-step explanation:

its 5 and this the correct answer

Who knows how to do this I TRULY NEED HELP

Answers

Answer:

11

Step-by-step explanation:

if the two triangles are similar, that means that they are proportional to each other.

If you look at how they are shaped, they look the same, just one is smaller.

When you compare the two, you see that on triangle EFU, side EU corresponds with side VU on triangle VWU

EU = 7 and VU = 35

now divide so see what the multiplying factor is

35/7 = 5

so, when you divide the values on triangle VWU by 5, you get the values for  triangle EFU

35/5 = 7

side UW corresponds with side UF

UW = 55 and UF = ?

55/5 = 11

Side UF = 11

In an experiment, the variable that is manipulated is called the?
Measurement variable
Explanatory variable
Response variable
Confounding variable

Answers

Response variable.....

Answer:

Explanatory Variable is the right answer it is the variaable being manipulated and observed.

Step-by-step explanation:

PLEASE HELP I’M GIVING 15 POINTS

Answers

Sorry but I don't see any pictureessss--

What am I supposed to be answering??

Welp-

Sawarasenai kimi wa shoujo na no?~

a scientist is running a simulation of a hypothetical city since she wants to explore its environmental impact over time the city's population is increasing 15 percent every year and there are currently 57,000 people what will the population be in 12 years?

Answers

I have no clue if this is correct but the answer I got was 10,260,000

Answer:

203,549 !!!

Step-by-step explanation:

If y=32 when x=8, find y when x=30.

Answers

Answer: 120

*How to solve*

Step 1: Find how many times larger 30 is than 8

30/8= 3.75

Step 2: Multiply by y

32x3.75=120


Hope this helps comment below for more questions:)

Order the following set of numbers from least to greatest.

3/4, 0.72, 69%, 0.63

Answers

0.63, 69%, 0.72, 3/4

Answer:

qwhich one do we answer, 1, 2?????????

Step-by-step explanation:

Plsssss help plsssss I didn’t understand pls helpppppp

Answers

Disregard the 9x+3y in the pic. The answer is 3/4x-13/12=y

A gardener can trim a square lawn of side 50 metres in 4 hours. At the same rate, how long will it take him to trim a square lawn of side 25 metres?

A)1 hour
B)2 hours
C)2 hours 30 minutes
D)3 hours

Answers

Answer:

2 hours

Step-by-step explanation:

50 metres / 4 hours = 25 metres / x hours

cross multiply both sides

50x = 25(4)

50x = 100

divide 50 both side

x = 100/50

x = 2 hours

2hours because 25 is half of 50 and two is half of four

Pam has two part-time jobs. At one job, she works as a cashier and makes $8 per hour. At the second job, she works as a tutor and makes$12 per hour. One week she worked 30 hours and made$268 .

Answers

Answer: 8C + 12T= 268                C + T = 30

Step-by-step explanation:

Cashier:  8$/ hr

Tutor:       12$/hr

made $268 for 30 hours

C = # of hours for cashier

T= # of hours for tutor

*For these type of equations, keep $ with $ and quantity with quantity

So you would the 8/hr to 12/hr to equal the total money and add the quantity(in this equation c and t) with the total hours.

Solve by elimination

help
? i will give brainliest if ur right!

Answers

Answer:

r ≤ 13

Step-by-step explanation:

Okay, if admission is $4, then we have to take away 4 from 25 at the beginning, this leaves us with $21. Then, we divide 21 by 1.5 to get the amount of rides he can go on with all of his money. This is 14, but, he can't spend all his money, this means the maximum rides he can go on is 13. For the inequality, I think it is r ≤ 13. I hope this helps!

PLEASE HELP ME :) 20 points

Answers

Answer:

its d thats the right anwsers

Step-by-step explanation:

what is the answer to this radical equation
[tex]\sqrt{x + 13=7}[/tex]

Answers

Answer:

x = 36

Step-by-step explanation:

Given

[tex]\sqrt{x+13}[/tex] = 7 ( square both sides )

([tex]\sqrt{x+13}[/tex] )² = 7²

x + 13 = 49 ( subtract 13 from both sides )

x = 36

[tex]\sqrt{x+13}=7\\[/tex]

To solve the radical equation, completing the square all whole equation.

[tex](\sqrt{x+13})^2=7^2\\[/tex]

As defined, [tex](\sqrt{x})^2 =|x|[/tex]

Therefore, [tex](\sqrt{x+13})^2=|x+13|=x+13[/tex]  (Although Absolute Function gives 2 conditions, however - domain of radical function must be greater than or equal to 0. Meaning x < 0 for another condition doesn't apply.)

[tex]x+13=49\\x=49-13[/tex]

Move 13 to subtract.

[tex]x=36[/tex]

Therefore, the answer is x = 36.

hElp Me PLaesssssssssssssssssssssssssssss

Answers

I think it is the first one

Click on photo to see the whole thing​

Answers

Answer:

cveryc

Step-by-step explanation:

ITS C im good11123

Answer:

c

Step-by-step explanation:

Estimate 5,860÷2.1≈
i really need help on it.

Answers

Answer: it 2790

Step-by-step explanation:

The value of 5,860÷2.1 is 2790.

What is division?

In easy phrases, the division may be described because of the splitting of a massive institution into smaller companies such that every institution may have the same number of items. it's far an operation used for identical grouping and the same sharing in math.

What are the terminologies used in the division?

dividend, divisor, quotient remainder.

Learn more about division here: https://brainly.com/question/25289437

#SPJ2

The distance on a map between North Carolina and Louisiana is 4 inches. If the map’s scale is 1 inch = 237 miles, what is the actual distance between North Carolina and Louisiana?

Answers

Answer:

Answer is 948 miles.

Step-by-step explanation:

distance in inches is 4 inches on map

1 inch = 237 miles

4*237=948  

948 is the actual distance between north Carolina and Louisiana

(umm can anyone help me please) I’ll give brainlist <3

Answers

Answer:

12

Step-by-step explanation:

8 times 1.5

4 ,1/4 ,10 ,40
please help me :((((

Answers

Answer: 1/4 (0.25)

I hope this helps, and Happy Holidays! :)

HEB sells mangos for $2.50 each. Costco Sells them for $1.75 each but has a
membership fee of $50. How many mangos would you need to buy to have the 2 costs
equal each other?

Answers

Answer:

$20.833

Step-by-step explanation:

HEB:

Total cost = 2.50m

Costco:

Total cost = 50 + 1.75m

Where,

m = number of mangoes

HEB = Costco

2.50m = 50 + 1.75m

2.50m - 1.75m = 50

O.75m = 50

m = 50 / 0.75

= $20.833

what is 0.716 divided by 5?

Answers

the answer would be 0.1432

A pair of jeans is marked up 20% on the original price the original price was $50 what is the sale price of the pair of jeans before salrs tax

Answers

Answer:

$60

Step-by-step explanation:

50 x 0.2 = 10

10 + 50 = 60

A music company offers lessons. They charge a registration fee of $30 and then $40 per lesson The equation y 40x + 30 represents the total cost y of x lessons. What is the y-intercept and what does it represent in the context of the problem?​

Answers

Answer:

THe y intercept  is 30 and it represents the registration fee

Step-by-step explanation:

tatiana earns money by babysitting her little cousin. when she babysits for 7 hours she earns 94.50. which equation represents her total wages based on the hours that she works?

answers:
y=2x
y=7x
y=27x
y=13.50x

Answers

Answer:

y=13.50x

Explanation:

94.50/7 = 13.5

hold on i think im  wrong who knows sorry

1. A bicycle that normally sells for $150 is on sale of 35% off. What is the sale price of the bicycle?

Answers

The sales price would be $102.50

How many terms are in the expression below?

-4x + 7 + 2x + 10

Answers

Answer:

3

Step-by-step explanation:

Christopher is hanging Christmas lights along the perimeter of his house by using his 15 foot ladder. The base of the ladder is placed 4 feet away from the base of his house. How far up the house does his ladder reach?

Answers

Answer:

14.45 feet

Step-by-step explanation:

The set up is a right angled triangle;

The length of the ladder = hypotenuse = 15foot

The base of the ladder is the adjacent = 4feet

The height of th house is the opposite = x

Using the pythagoras theorem;

hyp² = opp² + adj²

15² = opp²+4²

opp² = 15²- 4²

opp² = 225 - 16

opp² = 209

opp = 14.45feet

Hence the ladder reaches 14.45 feet up the house

factorise x^2-4 in maths

Answers

Answer:

(x-2)(x+2)

Step-by-step explanation:

use the difference of squares

x²-4 = x²-2² = (x-2)(x+2)

The person above me is correct.

Need help please!!!!!

Answers

Answer:

0 or 5/12

Step-by-step explanation:

with everything subtracted its 0 but with only subtracting 1/6 its 5/12

Help me plzzzz

Ahhhhhhhhhhh

Answers

Answer:

how u do it and I can help

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