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Vladimir79 [104]
4 years ago
6

Twenty-five lamps are placed around a circle-shaped garden. How many straight lines could be found if each lamp is connected to

all the rest ?
Mathematics
1 answer:
astraxan [27]4 years ago
8 0

Answer:

300

Step-by-step explanation:

every lamp can connect other lamps ,from the first ,it can connect the other 24 lamps,and then, the second ,can also connect other 24 。but the line between the first and the second is counted twice。

so it would be:

(1+2+3+...+24)×24÷2=300

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Please help due ASAP <br> Show workings
kirill [66]

Answer:

7

Step-by-step explanation:

BW is 1/3 of the way of JB

like the other question we set up an equation

2x+1=10x+1 but because BW is only one third of the way we have to multiply its side by 3 and the new equation is

9x+3=10x+1

step 1: subtract each side by 9x

3=x+1

step 2; subtract each side by 1

2=x

Next we plug in 2 to x in 3x+1 and get a final answer of

BW = 7

7 0
4 years ago
Which of these taxes helps provide health insurance for people who are retired or disabled?
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3 years ago
Kim read 3 books in 2 hours. She took the same amount of time to read the
sergeinik [125]

Answer: Kim took 50 minutes to read the third book.

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5 0
3 years ago
Item 7
Katyanochek1 [597]

i am sorry i was gonna anwer but i keep getting it wrong mys elf

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4 years ago
Given a sphere of diameter, d. What is the percentage increase in its volume when surface area increases by 21%?
lawyer [7]
<span>S1 = Pi * D1^2
solve for D1
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 S2 = 1.21*S1
S2= 1.21 * Pi * D1^2
 1.21 * Pi * D1^2=
Pi * D2^2
 D2 D2 = sqrt( 1.21 * D1^2)
  Now V2 = pi/6 * D2^3. V2
 = pi/6 ( sqrt(1.21*D1^2))^3 V2
= pi/6 * (1.21 * D1^2)^(3/2) V2
= pi/6 * 1.21^(3/2) * D1 ^3 = (pi/6 * D1^3) * 1.21^3/2 = V1 * 1.21 ^(3/2)
=43% approximately</span>
8 0
3 years ago
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