All categories

3 years ago

Please help meee brainliest

Mathematics

1 answer:

sergejj [24]3 years ago

7 0

Answer: 19.

Step-by-step explanation:

9 -3 / 1/3 + 1

6 / 1/3 + 1

(6 * 3/1) + 1 also written as (6 * 3) + 1

18 + 1

= 19.

You might be interested in

Please help me with geometry ASAP!!!

Makovka662 [10]

Answer:

asking all these questions why you asking all these questions

Step-by-step explanation:

4 0

3 years ago

A wire bonding process is said to be "in control" if the mean pull strength is 10 pounds. It is known that pull-strength measure

Degger [83]

Answer:

B. 0.0099

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this roblem, we have that:

$\mu = 10, \sigma = 1.5, n = 4, s = \frac{1.5}{\sqrt{4}} = 0.75$

Probability of being out of control.

Less than 8.25 pounds, which is the pvalue of Z when X = 8.25. So

$Z = \frac{X - \mu}{\sigma}$

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

$Z = \frac{8.25 - 10}{0.75}$

$Z = -2.33$

$Z = -2.33$ has a pvalue of 0.0099.

So the correct answer is:

B. 0.0099

4 0

4 years ago

Find x and the size of each angle in this triangle. 6x + 20 4x 7x - 10

kozerog [31]

Answer:

x= 10

6x+20= 80°

4x= 40°

7x= 60°

3 0

3 years ago

Read 2 more answers

Plz do number 10. its 5th grade math

faltersainse [42]

Answer:

589 divided by 5 would be 65. to check your answer you can say 65*5 which would be equal to 589.

7 0

3 years ago

Read 2 more answers

Algebraic of coefficient of 3

N76 [4]

In an algebraic expression, terms are the elements separated by the plus or minus signs. This example has four terms, 3x2, 2y, 7xy, and 5. Terms may consist of variables and coefficients, or constants.

Variables
In algebraic expressions, letters represent variables. These letters are actually numbers in disguise. In this expression, the variables are x and y. We call these letters "variables" because the numbers they represent can vary—that is, we can substitute one or more numbers for the letters in the expression.

Coefficients
Coefficients are the number part of the terms with variables. In 3x2 + 2y + 7xy + 5, the coefficient of the first term is 3. The coefficient of the second term is 2, and the coefficient of the third term is 7.

If a term consists of only variables, its coefficient is 1.

Constants
Constants are the terms in the algebraic expression that contain only numbers. That is, they're the terms without variables. We call them constants because their value never changes, since there are no variables in the term that can change its value. In the expression 7x2 + 3xy + 8 the constant term is "8."

Real Numbers
In algebra, we work with the set of real numbers, which we can model using a number line.

5 0

4 years ago