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Aleks04 [339]
3 years ago
7

Find a counterexample for the statement. If p is prime, then p2 + 4 is prime.

Mathematics
1 answer:
uysha [10]3 years ago
7 0
P=2 then 2^2+4=8
P=11 then 11^2+4=125
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Which domain restrictions apply to the rational expression? x^2+4x+4 / x^2−4 Select each correct answer x≠−4 x≠−2 x≠0 x≠2 x≠4
Degger [83]
The correct answers are x≠2 and x≠(-2).

Domain restrictions are any points in the domain where the function will not have a value.  This basically means that it's a point where x won't work in the function.

For the numerator, any value will work for x.  We can have a value of 0 in the numerator, or a positive, negative, or decimal number.

However, the denominator cannot equal 0.  This is because a fraction bar represents division, and we cannot divide by 0.  The values that make the denominator 0 can be found by:

x²-4=0

Add 4 to both sides:
x²-4+4 = 0+4
x² = 4

Take the square root of both sides:
√x² = √4

x = 2 or x = -2.
7 0
3 years ago
Read 2 more answers
Write the expression 2a+b in the form of a fraction with the given denominator. Check if the domain of the expression changed. I
Ymorist [56]

Answer:

See below

Step-by-step explanation:

I will assume the given denominator is 3a as there is nothing attached to the statement.

Lets first look at the domain of 2a+b. As it is a polynomial with unknowns a and b, we know it has its domain in all real numbers for both  a and b as every polynomial does. For verifying it replace a and b by any real number you can think of.

Domain = a, b belonging to R

Now, if we divide 2a+b by 3a we will have:

(2a+b)/3a

As know we don not have a polynomial we cant state that the domain will still be all the real numbers for sure. We need to go further.

We have a fraction and as every fraction the denominator CAN'T be equal to 0, so 3a MUST be different to 0. This means that a MUST be different to 0. So, now our domain changes:

domain' = a, b belonging to R and a different to 0.

6 0
3 years ago
Members of the Science Club went to a history museum. It cost $7.25 for each member of the club. If 90 members went to the museu
malfutka [58]
652 I believe or something close to that.
5 0
3 years ago
10.
yan [13]

Answer:

D. y = -5^x – 27

Step-by-step explanation:

Find the negative reciprocal of the slope of the original line and use the point-slope formula  y − y 1 = m ( x − x 1 )  to find the line perpendicular to  − x + 5 y = 14 .

y = − 5 x − 27                         PERPENDICULAAR

...................................................................................................................................................

Find the slope of the original line and use the point-slope formula  y − y 1 = m ( x − x 1 )  to find the line parallel to  − x + 5 y = 14 .

y = 1 /5 x − 1                             PARALLEL

7 0
3 years ago
In the document below it´s assigned a portion of the book, from there you need to choose a chapter, re-do the situation that the
Molodets [167]
What are you asking anyways hope you get a good grade
6 0
3 years ago
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