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3 years ago

My friend bought a headset on Ebay for $45 and then sold it for 40% more. How much did he sell it for?

Mathematics

2 answers:

3241004551 [841]3 years ago

4 0

Answer:

Step-by-step explanation:

Multiply 0.4 by 45 (which is 18) then add that to 45.

shutvik [7]3 years ago

3 0

Answer: Your friend sold it for $63 dollars

Step-by-step explanation:

40%= 40/100= .4

Multiply 45 by .4

= 18

Add 18 to 45

45+18=63

Your answer is 63

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Read 2 more answers

25% of all who enters a race do not complete. 30 haveentered.

nikklg [1K]

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

2y-____=0;y=0 HELPPPPPPP

AVprozaik [17]

Answer:

D.) 0

Step-by-step explanation:

Its not A. cause 2y−2=0 is y = 1

Its not B. cause 2y−1=0 is y = 1/2

Its not C. cause 2y−3=0 is y = 3/2

Soo... The only option left is D.

It IS D. cause 2y − 0 = 0 is y=0

So you are Correct!!!

hope I helped... <3

Good luck dear :)

4 0

4 years ago