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tiny-mole [99]
3 years ago
8

The numbers x and y have a sum of 1 and a difference of 11.

Mathematics
1 answer:
spin [16.1K]3 years ago
7 0
Sum means add
difference means subttract

x+y=1
x-y=11
add the 2 equations together
2x+0y=12
divide 2
x=6
subitute
6+y=1
subtract 6
y=-5

x=6
y=-5
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25% of all who enters a race do not complete. 30 haveentered.
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Answer:

The probability that exactly 5 are unable to complete the  race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the  race?

So, We will use binomial

Formula : P(X=r) =^nC_r p^r q^{n-r}

p is the probability of success i.e. 25% = 0.25

q is the probability of failure =  1- p  = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the  race

n = 30

r = 5

P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}

P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}

P(X=5) =0.1047

Hence the probability that exactly 5 are unable to complete the  race is 0.1047

6 0
3 years ago
50 POINTS/ WILL MARK BRAINLIEST
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Answer:

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3 years ago
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galina1969 [7]
Less because 3×3=6 and 6 and 16 arent equal
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3 years ago
Please answer correctly, will give brainly to best answer, please do explain your answer
Liono4ka [1.6K]

Answer: 26

2³ + 4(2 + x) for x = 10

- first do 4(2 + x) which is

8+4x

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You get 2 times 2 times 2.

That would get 8

Our expression is 8 + 8+x

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katen-ka-za [31]

Answer:

Step-by-step explanation:

lm=6x+3

mn=4x-17

ln=x+14

lm+mn>ln

6x+3+4x-17>x+14

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mn+ln>lm

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3 years ago
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