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Aleks [24]
3 years ago
10

Prime factors of 625

Mathematics
1 answer:
ipn [44]3 years ago
3 0
625=5\cdot 5\cdot 5\cdot 5\\ 625={ 5 }^{ 4 }

{ 5 }^{ 4 } is 625's prime factor
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15 less than a number tripled is equivalent to the difference of the same number and 12
Nitella [24]

Step-by-step explanation:

x = number

3x - 15 = (x - 12)×-4 or (12-x)×-4

3x - 15 = -4x + 48 or -48 + 4x

7x = 63, x = 9 or

33 = x

4 0
3 years ago
Prove that root 7 is irrational by the method of contradiction
Alchen [17]

Let assume that \sqrt7 is a rational number. Therefore it can be expressed as a fraction \dfrac{a}{b} wherea,b\in\mathbb{Z} and \text{gcd}(a,b)=1.

\sqrt7=\dfrac{a}{b}\\\\7=\dfrac{a^2}{b^2}\\\\a^2=7b^2

This means that a^2 is divisible by 7, and therefore also a is divisible by 7.

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Analogically to a^2=7b^2 ------- b^2 is divisible by 7 and therefore so is b.

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8 0
3 years ago
Given: 2x + 30 = -4(5x -2);<br> Prove: x = -1
Lady_Fox [76]
2x + 30 = -20x + 8
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6 0
3 years ago
Please solve the questions
Wewaii [24]

Answer:

Step-by-step explanation:

For a

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x = 15 -2

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For B

x - 12 = 14

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For C

3x = 12

x = 12/3

x = 4

Hope it helps:)

5 0
3 years ago
I don’t know the answer or how to do this, help!
makvit [3.9K]

Answer:

B.

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y = x^2 - x - 12

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y = x + 3

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(the answer key is most probably faulty there's no way for y to be 0 in both scenarios)

6 0
3 years ago
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