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3 years ago

Why dont people answer the questions i post :)

Mathematics

2 answers:

Vadim26 [7]3 years ago

6 0

Answer:

idk but good luck :)

Step-by-step explanation:

N76 [4]3 years ago

4 0

Answer:

cuz your questions are hard

You might be interested in

what is the amount of orange juice, written as a fraction greater than 1, that is used in the recipe?

KengaRu [80]

Kinda need to know the recipe.

6 0

3 years ago

Monica deposits $300 into a savings account that has a simple interest of 3.4%. Paul deposits $400 into a savings account that h

romanna [79]

Answer: Monica earned more interest

Step-by-step explanation:

The formula for calculating simple interest is given by :

S.I = $\frac{ptr}{100}$

For Monica

S.I = 300 x 3.4 x 1 / 100

S.I = $10.2

For Paul

S.1 = 400 x 2.4 x 1 / 100

S.I = $9.6

Therefore : Monica earned more interest

7 0

3 years ago

A student takes a multiple-choice test that has 11 questions. Each question has five choices. The student guesses randomly at ea

marissa [1.9K]

Answer:

a) P(6) = 0.0097

b) P(More than 3) = 0.1611

Step-by-step explanation:

For each question, there are only two possible outcomes. Either it is guessed correctly, or it is not. Questions are independent of each other. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A student takes a multiple-choice test that has 11 questions.

This means that $n = 11$

Each question has five choices.

This means that $p = \frac{1}{5} = 0.2$

(a) Find P (6)

This is P(X = 6).

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 6) = C_{11,6}.(0.2)^{6}.(0.8)^{5} = 0.0097$

P(6) = 0.0097

(b) Find P (More than 3).

Either P is 3 or less, or it is more than three. The sum of the probabilities of these outcomes is 1. So

$P(X \leq 3) + P(X > 3) = 1$

We want P(X > 3). So

$P(X > 3) = 1 - P(X \leq 3)$

In which

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{11,0}.(0.2)^{0}.(0.8)^{11} = 0.0859$

$P(X = 1) = C_{11,1}.(0.2)^{1}.(0.8)^{10} = 0.2362$

$P(X = 2) = C_{11,2}.(0.2)^{2}.(0.8)^{9} = 0.2953$

$P(X = 3) = C_{11,3}.(0.2)^{3}.(0.8)^{8} = 0.2215$

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0859 + 0.2362 + 0.2953 + 0.2215 = 0.8389$

Then

$P(X > 3) = 1 - P(X \leq 3) = 1 - 0.8389 = 0.1611$

P(More than 3) = 0.1611

8 0

4 years ago

(5m+1)x^2 - 8ax + 3a

Inessa [10]

the answer was 5mx^2-8ax+x^2+3a

let's show your

(5m+1)x^2-8ax+3a

distribute

(5m)(x^2)+(1)(x^2)-8ax+3a

5mx^2+x^2-8ax+3a

answer was 5mx^2-8ax+x^2+3a

hope this helps

8 0

3 years ago

7. Suppose that y varies inversely with x. Write an equation for the inverse variation,

lys-0071 [83]

Answer:

The answer is

Step-by-step explanation:

The statement

y varies inversely with x is written as

$y = \frac{k}{x}$

where k is the constant of proportionality

To find k substitute the values of x and y into the equation

From the question

y = 4

x = 6

We have

$4 = \frac{k}{6}$

Cross multiply

k = 4 × 6

k = 24

So the formula for the variation is

Hope this helps you

7 0

4 years ago