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IrinaK [193]
3 years ago
9

Ben has ran for president of his class if there are 400 and 10 students and he received 72% of the vote. How many students were

for Ben?​
Mathematics
1 answer:
blagie [28]3 years ago
6 0

Answer:

287

Step-by-step explanation:

400+10=410

(70:100)*410

(70*410):100

28700:100 = 287

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Katie's car averages 35 miles per hour. She has marked her
Nat2105 [25]

Answer: 175, 210, 245

Step-by-step explanation:

3 0
3 years ago
Which expression is equivalent to -3.5(4x – 3)? A. -3.9x – 3.2 B. -3.9x + 3.2 C. -14x + 10.5 D. -14x – 10.5
romanna [79]

Answer:

I do not know

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Can someone help me with this question?
belka [17]

Answer:

The required probability is 0.0155.

Step-by-step explanation:

We are given that the one-year survival rate for pancreatic cancer is 20%.

Of 12 people diagnosed with pancreatic cancer at one hospital, 6 survived one year.

The above situation can be represented through binomial distribution;

P(X=r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,......

where, n = number of trials (samples) taken = 12 people

            r = number of success = 6 survived

            p = probability of success which in our question is probability of

                  one-year survival rate for pancreatic cancer, i.e; p = 20%

Let X = <u><em>Number of people survived one year</em></u>

So, X ~ Binom(n = 12 , p = 0.20)

Now, the probability that 6 survived one year is given by = P(X = 6)

              P(X = 6)  =  \binom{12}{6} \times 0.20^{6} \times (1-0.20)^{12-6}

                             =  924 \times 0.20^{6} \times 0.80^{6}

                             =  <u>0.0155</u>

5 0
4 years ago
A combination lock has numbers 0-49 on it. How many different 3-digit lock
Harman [31]

Answer:

19,600

Step-by-step explanation:

0-49=50 numbers

n=50

r=3

C(n,r)=n!/(r!(n-r)!)

=50!/(47!)(3!)

C(n,r)=C(50,3)

=50!/(3!(50−3)!)

= 19600

3 0
3 years ago
A triangle has side lengths of (8w + 8x) centimeters, (3w+10y) centimeters, and
sukhopar [10]

Answer:

(8w+8x)(8w+8x)+(3w+10y)(3w+10y)+(4y+8x)(4y+8x)

Step-by-step explanation:

6 0
1 year ago
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