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3 years ago

Identify the equivalent expression for √x+3

Mathematics

1 answer:

Zarrin [17]3 years ago

4 0

Answer:

The answer to your question is: letter C. x¹/² + 3

Step-by-step explanation:

Just remember that square roots are also fraction powers.

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Which of the binomials below is a factor of this trinomial?

blsea [12.9K]

Answer:

D. x-6

Step-by-step explanation:

4x^2 - 4x - 120

4(x-6)(x+5) are the factors.

5 0

3 years ago

At full price, Melvin would pay 1.6791.6791.679 dollars per liter of gasoline. Using his loyalty card, Melvin only pays 1.4391.4

Nadya [2.5K]

Answer:

Melvin pays 0.24 dollars less using the loyalty card.

Step-by-step explanation:

We are given that,

Original price payed by Melvin = 1.679 dollars per liter

Using the loyalty card, He pays = 1.439 dollars per liter

So, the difference in the amount of money paid by Melvin is,

Difference = Original price - Price using loyalty card

i.e. Difference = 1.679 - 1.439 = 0.24 dollars

Hence, Melvin pays 0.24 dollars less using the loyalty card.

7 0

3 years ago

Read 2 more answers

Please help me with this question :) thanks.

Zepler [3.9K]

Answer:

( -2 , 3 )

Step-by-step explanation:

When reflecting across the y-axis, you change the coordinates by ( -x , y )

( 2 , 3 ) --- ( -x , y ) --- ( -2, 3 )

6 0

3 years ago

Read 2 more answers

How many distinct permutations can be formed using the letters of the word "PAPER"?

alekssr [168]

Answer:

2 i think

Step-by-step explanation:

8 0

3 years ago

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained p

Alekssandra [29.7K]

Using the z-distribution and the formula for the margin of error, it is found that:

a) A sample size of 54 is needed.

b) A sample size of 752 is needed.

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

90% confidence level, hence $\alpha = 0.9$ , z is the value of Z that has a p-value of $\frac{1+0.9}{2} = 0.95$ , so $z = 1.645$ .

Item a:

The estimate is $\pi = 0.213 - 0.195 = 0.018$ .

The sample size is <u>n for which M = 0.03</u>, hence:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.018(0.982)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.018(0.982)}$

$\sqrt{n} = \frac{1.645\sqrt{0.018(0.982)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.018(0.982)}}{0.03}\right)^2$

$n = 53.1$

Rounding up, a sample size of 54 is needed.

Item b:

No prior estimate, hence $\pi = 0.05$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.5(0.5)}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.5(0.5)}$

$\sqrt{n} = \frac{1.645\sqrt{0.5(0.5)}}{0.03}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.5(0.5)}}{0.03}\right)^2$

$n = 751.7$

Rounding up, a sample of 752 should be taken.

A similar problem is given at brainly.com/question/25694087

5 0

3 years ago