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Zigmanuir [339]
3 years ago
8

F(x) = 14 - 0.5 f(30) =

Mathematics
2 answers:
Tasya [4]3 years ago
5 0

The Answer is actually -1

serg [7]3 years ago
4 0

Answer:

13.5

Step-by-step explanation:

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Previous studies on sleep tendencies report that, on average, an adult American will sleep for 6 hours each night with a standar
Rasek [7]

Answer:

b) One sample z-test for means

Step-by-step explanation:

Normal Distribution

we have μ₀ (population mean from previous studies)

sample size    n  =  100

standar deviation of population   σ  = 0.75

And it was determined from sample, that μ = 5 : so we want to know if, at some significance level that value (which is smaller than population mean ) could help in relation to decide about rejecting hypothesis  H₀

We should use a z one tail-test for means (left tail)

4 0
3 years ago
The multiplication property of equality could be used to solve which of the following equations?
Evgesh-ka [11]

Multiplication property of equality can be used to solve: \frac{b}{-2} = 18

Step-by-step explanation:

First of all, lets define the multiplication property of equality

The multiplication property of equality states that if one side of an equation is multiplied with any number the other side is also multiplied with the number.

Given equations are:

(x+2)(x-2) = 0\\m+7 = -12\\\frac{b}{-2} = 18\\-3+y = 7

By observing the equations we can see that only third equation has a fraction in it so it has to be multiplied with -2 for solution

\frac{b}{-2} * - 2 = 18*-2\\b = -36

Hence,

Multiplication property of equality can be used to solve: \frac{b}{-2} = 18

Keywords: Linear equation, properties

Learn more about linear equations at:

  • brainly.com/question/3375830
  • brainly.com/question/3398261

#LearnwithBrainly

7 0
3 years ago
Find the square roots by division method of 210,681 please tell me
padilas [110]

Answer:

  459

Step-by-step explanation:

The "long division method" algorithm for square root makes use of the relation described by the square of a binomial.

  (a +b)² = a² +2ab +b² = a² +b(2a +b)

<h3>Steps</h3>

The value for which the root is desired is written with digits marked off in pairs either side of the decimal point.

The initial digit of the root is the integer part of the square root of the most-significant pair. Here that is floor(√21) = 4. This is shown in the "quotient" spot above the leftmost pair. The square of this value is subtracted, and the next pair brought down for consideration. Here, that means the next "dividend" is 506.

The next "divisor" will be 2 times the "quotient" so far, with space left for a least-significant digit. Here, that means 506 will be divided by 80 + some digits. As in regular long division, determining the missing digit involves a certain amount of "guess and check." We find that the greatest value 'b' that will give b(80+b) ≤ 506 is b=5. This is the next "quotient" digit and is placed above the "dividend" pair 06. The product 5(85) = 425 is subtracted from 506, and the next "dividend" pair is appended to the result. This makes the next "dividend" equal to 8181.

As in the previous step, the next "divisor is 2 times the quotient so far: 2×45 = 90, with space left for the least significant digit. 8181 will be divided by 900-something with a "quotient" of 9. So, we subtract the product 9(909) = 8181 from the "dividend" 8181 to get the next "dividend." That result is zero, so we're finished.

The root found here is 459.

__

<em>Additional comment</em>

In practice, roots are often computed using iterative methods, with some function providing a "starter value" for the iteration. Some iterative methods can nearly double the number of good significant digits in the root at each iteration.

Using this "long division method," each "iteration" adds a single significant digit to the root. Its advantage is that it always works, and is generally suitable for finding roots by hand. Once the number of root digits begins to get large, the "divisor" starts to be unwieldy.

8 0
2 years ago
N cubed divided by 2
bogdanovich [222]
Is it asking to rewrite it? If so, it’s N^2/2
7 0
2 years ago
What does -8(6x - 2) equal? How do I get my answer?
Free_Kalibri [48]

Answer:

-48x+16

Step-by-step explanation:

-8(6x - 2) first multiply each term in the parentheses by 8 to get -8x6x-8x(-2) and calculate the product to get your answer which is -48x+16

7 0
3 years ago
Read 2 more answers
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