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2 years ago

I need help with SOME 7th grade math

Mathematics

1 answer:

nekit [7.7K]2 years ago

3 0

Answer:

If you ask the question then I can help you.

Step-by-step explanation:

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Evaluate 3x2 - 1 when x = 2.

Shalnov [3]

Answer:C or 11

Step-by-step explanation:

3x²-1

First you insert x... which is 2

3(2)²-1

then you square the 2. (multiply it by itself)

3(4)-1

Then you multiply 3 by 4 to get 12

12-1

And then you subtract for your answer

4 0

2 years ago

What is the measurement of 3/4 in simplest form

stepan [7]

Answer:

It is in simplest form

Step-by-step explanation:

6 0

3 years ago

The number of visitors to a state park in one year was greater than 62,558 but less than 62,808. Which could have been the numbe

AnnyKZ [126]

Answer:250

Step-by-step explanation:

6 0

2 years ago

Q=P(R+R) (SOLVE FOR P)

forsale [732]

Isolate the variable by dividing each side by factors that don't contain the variable. p=q/2r

4 0

2 years ago

Sixty-eight percent of adults in a certain country believe that life on other planets is plausible. You randomly select five adu

Pavlova-9 [17]

Answer:

Mean = 3.4

Variance = 1.088

Standard deviation = 1.0431

Step-by-step explanation:

$P=0.68\\ \\N=5$

The mean of a binomial distribution with parameters N (the number of trials) and p (the probability of success for each trial) is $m=N\cdot p$

Thus,

$m=5\cdot 0.68=3.4$

The variance of the binomial distribution is $s^2=Np(1-p)$ , where $s^2$ is the variance of the binomial distribution, so

$s^2=5\cdot 0.68\cdot (1-0.68)=3.4\cdot 0.32=1.088$

The standard deviation $s$ is the square root of the variance $s^2,$ so

$s=\sqrt{1.088}\approx 1.0431$

3 0

2 years ago