Can someone please help me out! and please explain your answer, and how you got it right! thank you so much!

What is (20-(-16))=20+16=36

wel

Answer:

Yes.

(20-(-16)) = 20 + 16

20 + 16 = 36 thus

(20-(-16)) = 36

Step-by-step explanation:

With your equation, I'm pretty sure you are trying to determine whether or not this equation is true. Let's start with the first part.

(20-(-16))

Let's break it down.

20 - -16

Whenever a number is like that, it becomes a positive. (I don't really remember what its called, but it flips in negativity)

20 + 16

20 + 16 = 36.

36 = (20-(-16))

3 0

3 years ago

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 380 babies were born, a

Alex Ar [27]

Answer:

The 99% confidence interval estimate of the percentage of girls born is (86.04%, 93.96%). Considering the actual percentage of girls born is close to 50%, the percentage increased considerably with this method, which means that it appears effective.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , 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 $1 - \frac{\alpha}{2}$ .

In the study 380 babies were born, and 342 of them were girls.

This means that $n = 380, \pi = \frac{342}{380} = 0.9$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a p-value of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.9 - 2.575\sqrt{\frac{0.9*0.1}{380}} = 0.8604$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.9 + 2.575\sqrt{\frac{0.9*0.1}{380}} = 0.9396$

As percentages:

0.8604*100% = 86.04%.

0.9396*100% = 93.96%.

The 99% confidence interval estimate of the percentage of girls born is (86.04%, 93.96%). Considering the actual percentage of girls born is close to 50%, the percentage increased considerably with this method, which means that it appears effective.

4 0

3 years ago

The Mendes family bought a new house 9 years ago for $108,000. The house is now worth $165,000. Assuming a steady rate of growth

SCORPION-xisa [38]

The yearly rate of appreciation is 6,333.3%

(I'm pretty sure I did that right)

3 0

3 years ago

PLEASE I need help with this math problem please

MakcuM [25]

Answer:

68 in³

Step-by-step explanation:

Cylinder = 3x2x2x3=36

Sphere = 4/3x3x2x2x2=32

36+32=68

6 0

3 years ago

I WILL PICK BRAINLEIST!!!!!!!!! + 15 points

lilavasa [31]

Answer:

A.) Constantly changes

Step-by-step explanation:

other options do not make sense

3 0

3 years ago