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Ierofanga [76]
3 years ago
7

I need help :) please thank you

Mathematics
2 answers:
posledela3 years ago
7 0
4
given : y=2x
ATQ, y=8
so 8=2x
x=8/2=4


Mark brainliest please
Sphinxa [80]3 years ago
4 0
Don’t know sorry wanted to help anyway
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In one round robin chess tournament, 36 games were played. How many players entered in the tournament?
ICE Princess25 [194]
\displaystyle
\binom{n}{2}=36\\\\
\dfrac{n!}{2!(n-2)!}=36\\
\dfrac{n(n-1)}{2}=36\\
n(n-1)=72\\
n^2-n-72=0\\
n^2-9n+8n-72=0\\
n(n-9)+8(n-9)=0\\
(n+8)(n-9)=0\\
n=-8 \vee n=9

The number of players can't be negative, so there was 9 players.


6 0
4 years ago
Suppose T(n) = n(n +1)/2. Find T(10).
jek_recluse [69]

Answer:

D. 55

Step-by-step explanation:

T(n) =  \frac{n(n +1)}{2} \\  \\ T(10) =  \frac{10(10 +1)}{2}  \\  \\T(10) =  \frac{10\times 11}{2}  \\  \\T(10) =  5 \times 11 \\  \\  \huge \red{ \boxed{T(10) =  55}}

4 0
3 years ago
What is the probability of rolling an odd number _or_ a 4 in **two rolls** of a (fair) six-sided die? may require outside refere
Stolb23 [73]
On a cube there are 6 sides. There are three odd numbers and one 4, so the probability of rolling these numbers is 4/6 which is 2/3. To get the probability of it from two rolls, we multiply it by itself once because it is being rolled once more. 2/3 x 2/3 is 4/9, so the probability of rolling an odd number or four in two roles is 4/9.
7 0
4 years ago
Every year, a dog sled race is held in Alaska and is approximately 1,150 miles in distance. Information about the top three race
ololo11 [35]

Answer:

Aaron completed the race in 9 days.  Mitch finished in the race in 8 days 20  hours. Dallas finished in 8 days 18 hours

Step-by-step explanation:

1. Dallas won the race. 8 days 18 hours

2. Mitch came in second. 2 days 5 hours x 4= 8 days 20

3. Aaron was 3rd. 4 days 12 hours x 2= 9 days

4 0
3 years ago
Find the following measures of central tendency for the given set of data.
Romashka [77]
Add them all up which gets you 48 then divide it by 10 cause of each number then you get your mean

Mean=4.8

Find the middle number and since it’s two add them 4+3=7 and then divide by 2 which gives you your median

Median=3.5


The two numbers repeated which gives you your mode

Mode=2
5 0
3 years ago
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