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2 years ago

Pls helpppp and thank you

Mathematics

1 answer:

Nookie1986 [14]2 years ago

3 0

If the question is y = blank(x) + blank (I can’t see the left of the equation
Then the answer is y = 2x + -4

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The mean score of a placement exam for entrance into a math class is 80, with a standard deviation of 10. Use the empirical rul

Sedbober [7]

Answer:

47.5%

Step-by-step explanation:

5 0

2 years ago

Tina ate 21 starbursts. If she ate 35% of the package of Starbursts, how many Starbursts are in the package?

mojhsa [17]

Answer:

60 starbursts

Step-by-step explanation:

We can set up an equation to find the answer. 21/x=0.35/1 because we're trying to find how many starbursts make up 100% of the package. So then to solve, we take 21x1 and then divide that by 0.35. From this we find that x=60.

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2 years ago

The simple interest I on an investment of P dollars at an interest rate r for t years is given by I = prt. Find the time it woul

goldenfox [79]

T=i/pr
t=900÷(21,000×0.046)
t=0.93167 y

3 0

2 years ago

Read 2 more answers

Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes

lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

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

where, n = number of trials (samples) taken = 680 trials

r = number of success

p = probability of success which in our question is 0.55

So, it means X ~ $Binom(n=680, p=0.55)$

Now, we have to find the mean and standard deviation of the given binomial distribution.

Mean of Binomial Distribution is given by;

E(X) = n $\times$ p

So, E(X) = 680 $\times$ 0.55 = 374

Standard deviation of Binomial Distribution is given by;

S.D.(X) = $\sqrt{n \times p \times (1-p)}$

= $\sqrt{680 \times 0.55 \times (1-0.55)}$

= $\sqrt{680 \times 0.55 \times 0.45}$ = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0

2 years ago

En un sistema masa resorte (masa atada a un muelle) ¿en qué punto la masa alcanza su máxima velocidad?

photoshop1234 [79]

Answer:

yo just search up Spanish translator

8 0

2 years ago