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Anna71 [15]
3 years ago
5

Is 3pi rational or irrational I keep getting mixed answers.​

Mathematics
2 answers:
Mnenie [13.5K]3 years ago
5 0

3pi is an irrational number an irrational number (pi) multiplied by a rational number is irrational

nika2105 [10]3 years ago
4 0

Answer:

Irrational.

Step-by-step explanation:

π, or pi, is an irrational number. 3 times π would still be irrational, as its decimal never ends.

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What are the zeros of the polynomial function f(x)=x(x-4)(x+9)? HELP NEEDED!!!!
Kipish [7]

Answer: 0, 4, -9

Set the equation equal to zero.

x(x - 4)(x + 9) = 0

Solve for x by setting each factor equal to zero.

The factors in the equation are x, (x - 4), and (x + 9).

  • x = 0
  • (x - 4) = 0

        x = 4

  • (x + 9) = 0

        x = -9

The zeros of the function are 0, 4, and -9.

7 0
3 years ago
The graph of y=ax^2+bx+c passes through points (0,5), (1,10), and (2,19). Find a+b+c.
nataly862011 [7]

Answer:   a = 2   b = 3   c = 5  

Literally a+ b+c = 10, but I don't think that's what the question means to ask.

the equation is 2x² +3x + 5

Step-by-step explanation:   Substitute the values of the given coordinates into the formula and use algebra (solve a system of equations by substitution and elimination) to get the values  of a,b & c

y=ax²+bx+c    using  (0,5), (1,10), and (2,19)

5=a(0)²+b(0)+c   becomes 5= 0+0 + c .so we find c = 5

10=a(1)²+b(1)+c    becomes 10 = a + b + c

19=a(2)²+b(2)+c .  becomes 19 = 4a + 2b + c

Substitute the 5 for c.  Then rewrite

10 = a + b + 5      becomes     5 = a+ b     to eliminate b multiply this be (-2)

(-2)( 5 = a+ b) .to get -10 = -2a - 2b  

19 = 4a + 2b + 5  becomes   14 = 4a + 2b  

_______________  Add these two

14 = 4a + 2b

<u>-10 = -2a - 2b</u><u> </u>    this will eliminate the "b" term

4 = 2a       divide both sides by 2   so you have   a = 2  

substitute in 10=a(1)²+b(1)+5 to find b

10=2(1)²+b(1)+5 .becomes  5 = 2 + b   Subtract 2 from both sides

b = 3

So now you have all three values:  

a = 2  b= 3  c = 5  

I am attaching the graph. I hope this deserves Brainiest.

Best wishes in your studies!

4 0
3 years ago
Help please i don't want to get held back
pogonyaev

Answer:

30GB trust me I will not let you fail

Step-by-step explanation:

120/4 = 30gb

7 0
2 years ago
Read 2 more answers
HELP PLEASE 26 POINTS!! please provide an explanation tooo!!!!
Mars2501 [29]

Answer:

B

Step-by-step explanation:

In the case of this distance, trying to imagine 5 x 10^6 is obviously way too ridiculous

8 0
2 years ago
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Find the surface area of the cylinder in terms of pi.
Svet_ta [14]
I think the answer is c

4 0
3 years ago
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