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Naddika [18.5K]
3 years ago
13

Determine if 9 is rational or irrational and give a reason for your answer.

Mathematics
2 answers:
Irina18 [472]3 years ago
5 0

Answer:

9 is an rational number because it is a whole number

Step-by-step explanation:

meriva3 years ago
4 0

Answer: 9 is rational

Step-by-step explanation:

9 is a rational number because it can be written as a fraction in a form a/b where b is not zero.  9 is the same as 9/1.  

Irrational numbers cannot be converted into a fraction because they do not terminte or repeat.

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How many math books and English books did Nicole purchase?
Ksju [112]
Create a system if equations to solve this.

First equation:
25m + 24e = 220

Second equation:
m + e = 9

Then you must solve the second equation for a variable.

Change m + e = 9 to e = 9 - m.

Then substitute (9 - m) for e in the first equation.

So 25m +24e = 220 becomes 25m + 24(9 - m) = 220.

Now you can solve the first equation because the only variable in it is m.

25m + 24(9 - m) = 220 (Original equation)
25m + 216 - 24m = 220 (Distribute)
m + 216 = 220 (Combine like terms)
m = 4 (Simplify)

Now plug in 4 for m in the second equation.

m + e = 9 (Original equation)
(4) + e = 9 (Substitute)
e = 5 (Simplify)

m represents Math Books and e represents English Books, so Nicole purchased 4 Math Books and 5 English Books.
6 0
2 years ago
The height of a rectangular prism is 3 feet. The length and width can be expressed as x-1 and x+4. If the volume of the prism is
SashulF [63]

Answer:

Step-by-step explanation:

Volume  = 198 ft

length * width * height = 198

(x - 1) * (x + 4) * 3 = 198

(x - 1) * (x + 4)  = 198/3

(x - 1) * (x + 4) = 66

x*x + x*4 -1*x - 1*4 = 66   {Use FOIL method to multiply}

x² + 4x - x - 4 = 66

x² + 3x - 4 =66

x² + 3x - 4 - 66 = 0

x² + 3x - 70 = 0

Now factorize.

x² + 10x - 7x - 7*10 = 0

x(x +10) - 7(x + 10 ) = 0

(x + 10)(x - 7) = 0

x - 7 = 0 {x + 10 is ignored because measurement cannot be in negative}

x = 7

length = x - 1 = 7 - 1 = 6ft

Width = x + 4 = 7 + 4 = 11 ft

4 0
3 years ago
ASAP WHO EVER ANSWERS THIS WILL BE MARKED BRANLIEST
Kaylis [27]

Answer:

option A is the answer hope you find it helpful

3 0
3 years ago
What is the shape 1 circular base and 1curved surface
swat32
Circular based pyramid I believe
6 0
3 years ago
Read 2 more answers
Mathematics Diagnostic Assessment
stira [4]

Answer:

Step-by-step explanation:

C. Hope this helps!!!

6 0
2 years ago
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