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2 years ago

When 21 is subtracted from the square of a number, the result is 4 times the number.

Mathematics

1 answer:

bixtya [17]2 years ago

8 0

Answer:

Step-by-step explanation:

7^2 =49

49 -21 =28

28÷7 = 4

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One number is 10 more than the other. Their product is 299. Which of the following are the representations?

Talja [164]

Answer:

Step-by-step explanation:

the second number is just 10 more than the first

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2 years ago

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Hakeem subtracted 8 from a number, then multiplied the difference

Inessa [10]

Answer:

Step-by-step explanation:

(×-8)5=20

(5×-40)=20

5×(-40+40)=(20+40)

5×=60

5×÷5=60÷5

×=12

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2 years ago

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Please help will give brainliest if I can :)

Paraphin [41]

Answer:

So you take the 172 miles and you divide it by the 3cm that you have and that gives you 57.3 miles. And therefore 1cm would be equal to 57.3

Step-by-step explanation:

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2 years ago

A statistics textbook chapter contains 60 exercises, 6 of which are essay questions. A student is assigned 10 problems. (a) What

Scilla [17]

Answer:

a) P=0.3174

b) P=0.4232

c) P=0.2594

d) The shape of the hypergeometric, in this case, is like a binomial with mean np=1.

Step-by-step explanation:

The appropiate distribution to model this is the hypergeometric distribution:

$P(X=x)=\frac{\binom{s}{x}\binom{N-s}{M-x}}{\binom{N}{M}}=\frac{\binom{6}{x}\binom{54}{10-x}}{\binom{60}{10}}$

a) What is the probability that none of the questions are essay?

$P(X=0)=\frac{\binom{6}{0}\binom{54}{10-0}}{\binom{60}{10}}\\\\P(X=0)=\frac{1*(54!/(10!*44!)}{60!/(10!*50!)} =\frac{2.3931*10^{10}}{7.5394*10^{10}} = 0.3174$

b) What is the probability that at least one is essay?

$P(X=1)=\frac{\binom{6}{1}\binom{54}{9}}{\binom{60}{10}}\\\\P(X=1)=\frac{6*(54!/(9!*43!)}{60!/(10!*50!)} =\frac{3.1908*10^{10}}{7.5394*10^{10}} =0.4232$

c) What is the probability that two or more are essay?

$P(X\geq2)=1-(P(0)+P(1))=1-(0.3174+0.4232)=1-0.7406=0.2594$

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3 years ago

Find the equation of a line with slope -6 that goes through the point (-2,23)

elena55 [62]

Y - 23 = - 6 ( x + 2 )
Y - 23 = - 6x - 12
Y = - 6x + 11
Y + 6x = 11
Thanks me if it is correct !!

6 0

3 years ago