Which equation can be rewritten as x + 4 = x^2? Assume x > 0

Mathematics

2 answers:

wolverine [178]2 years ago

4 0

Answer:

$\sqrt{x+4} =x$

Step-by-step explanation:

$x+4=x^2$

Rewrite the given equation

To rewrite the given equation ,we need to remove the square from x on the right hand side.

To remove square we take square root onboth sides

$x+4=x^2$

Take square root on both sides

$\sqrt{x+4} =\sqrt{x^2}$

Square and square root gets cancelled

$\sqrt{x+4} =x$

djverab [1.8K]2 years ago

3 0

The answer is c, since this is the square root of both sides.

You might be interested in

To be able to do the problem 5(10 + 4) mentally, Zack does 50 + 20 instead of 5(14).

Maurinko [17]

He used distributive property

7 0

2 years ago

Human body temperatures have a mean of 98.20° F and a standard deviation of 0.62° F. Sally's temperature can be described by z =

irina1246 [14]

Answer:

Sally's temperature is 97.27 °F.

Step-by-step explanation:

All the information given in the question tells us that the human body temperatures are normally distributed with a population's mean = 98.20°F and a standard deviation = 0.62°F.

The question gives us Sally's temperature in a z-score. We have to remember that the standard normal distribution is a particular case of a normal distribution where the mean = 0 and the standard deviation = 1.

Using the standard normal distribution, we can determine every probability associated with a normal distribution "transforming" the raw scores, coming from normally distributed data, into z-scores.

A z-score gives us the distance from the population's mean and is in standard deviation units. So, a z = 1.5 tells us that the value is 1.5 standard deviations above the mean. Conversely, a z = -1.5 tells us that the raw score is also 1.5 standard deviation from the mean, but in the opposite direction, that is, below the mean.

The formula for a z-score is as follows:

$\\ z = \frac{x - \mu}{\sigma}$ (1)