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emmainna [20.7K]
3 years ago
6

Is x^2 - 16 a perfect square? Why?

Mathematics
2 answers:
Valentin [98]3 years ago
4 0

Answer:

yes

Step-by-step explanation:

Since both terms are perfect squares, factor using the difference of squares formula,  a ^2 − b^2  =( a + b ) ( a − b ) where  a = x  and  b = 4 . ( x + 4 ) ( x − 4 )

hopes this helps

harina [27]3 years ago
3 0

Answer:

no, if you plug in 1 for x, you get 1-16=-15 which is not a perfect square

Step-by-step explanation:

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Find the equation of the line perpendicular to y=−2 that passes through the point (4, −2).
vfiekz [6]

Answer:

x = 4

Step-by-step explanation:

y = - 2 is the equation of a horizontal line parallel to the x- axis.

A perpendicular line is therefore a vertical line parallel to the y- axis with equation

x = c

where c is the value of the x- coordinates the line passes through.

The line passes through (4, - 2 ) with x- coordinate 4 , thus

x = 4 ← equation of perpendicular line

5 0
3 years ago
HELP QUICK LIKE RIGHT NOW!please
pogonyaev

Answer:

1/2 = 1/2

Step-by-step explanation:

5/10 is equal to 1/2 and 1/2 cant get smaller making you answer 1/2 = 1/2

8 0
3 years ago
Read 2 more answers
The operating costs for each machine for one day have an unknown distribution with mean 1610 and standard deviation 136 dollars.
BabaBlast [244]

Answer:

20.27

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

Using the Central Limit Theorem for Means, what is the standard deviation for the sample mean distribution?

This is s when \sigma = 136, n = 45. So

s = \frac{136}{\sqrt{45}} = 20.27

So the correct answer is:

20.27

3 0
3 years ago
On a blueprint of a house, 48 millimeters represents 7 meters. The length of the living room is 60 millimeters on the blueprint.
Pani-rosa [81]
Here is the equation 48/7=60/x, 48÷7=6.8571428571. Now we know that every one meter in real life is equal to 6.8571428571 millimeters so, 60÷6.8571428571= 8.75 meters. The living room is 8.75 meters
3 0
3 years ago
A circle has a circumference of
d1i1m1o1n [39]

Answer:

the diameter is 1

Step-by-step explanation:

Since C = pi*d, solving for d would give 1

5 0
3 years ago
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