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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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Daniel surveyed a random sample of 100 students from his middle school to learn more about what type of school lunches are prefe
ivann1987 [24]

Answer:

<em>Spaghetti and Pizza are preferred almost equally.</em>

Step-by-step explanation:

Daniel surveyed a random sample of 100 students from his middle school to learn more about what type of school lunches are preferred based on his observation the table of the following is given as:

                        <u> Hamburgers  </u>           <u>Spaghetti </u>         <u> Pizza</u>

<u>Sample 1:</u>                 13                              43                     44

                      -----------------------------------------------------------------------

<u>Sample 2:</u>                20                              41                     39

                      -------------------------------------------------------------------------

<u> Total:</u>                       33                               84                   83

By looking at the table we see that the total number of spaghetti and Pizza chosen are almost equal as:

Total number of Spaghetti preferred=84.

and Total number of Pizza preferred=83.



8 0
3 years ago
Read 2 more answers
Answer Part A and Part B for the triangle shown
Tom [10]

Answer:

for Part A

Answer is C.

Step-by-step explanation:

\tan(a)  =  \frac{opposite}{adjacent }  \\

Here the angle, a is 60°, Opposite is 20 and adjacent is x.

Therefore we have,

\tan(60 )  =  \frac{20}{x}

Making x the subject gives us

x =  \frac{20}{ \tan(60) }

Part B

Value of x to the nearest tenth

x = 11.547 \\ to \: the \: nearest \: tenth \\ x = 12

5 0
3 years ago
A parachutist jumped from an airplane at an elevation of 11,880 feet above the ground.
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Answer:

[D] -552.5 feet

Step-by-step explanation:

You have to multiply 5 by -110.5

Hence, Answer = -552.5 feet

[RevyBreeze]

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3 years ago
Debbie rides her bike to school every day. On Monday, she rode 1.5 miles to school in 10
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Answer:

the second route

Step-by-step explanation:

1.5/10=0.15 miles/minute

3/15=0.2 miles/minute

0.2 is faster than 0.15

4 0
3 years ago
Ariah Janson
Ivan

Answer:

Root: (8/3,0)

Step-by-step explanation:

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