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ICE Princess25 [194]

3 years ago

8

10 times as many as 1 ten is

1 answer:

Elenna [48]3 years ago

4 0

Answer:

not sure sorry

Step-by-step explanation:

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Which law would you use to simplify the expression (4x)^9?

Dafna1 [17]

Answer:

Power of a product.

Step-by-step explanation:

Hope this helps!

=)

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2 years ago

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Solve 11 < or equal to -11v

nignag [31]

1 < or equal to - v

- 1 > or equal to v

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3 years ago

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Martin wants to buy 4 plastic figures that cost $17 each. How much money does he need to save to purchase the figure?

Nat2105 [25]

1 figure = $17 so you multiply 4 and 17 to get 68
Martin will need to save $68

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2 years ago

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Which expression is equivalent to 1/3 y?

MrMuchimi

Answer:

The answer is 1/6y+1/6(y+12)-2

Step-by-step explanation:

I used a math calculator.

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2 years ago

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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 $\dfrac{a}{b}$ where $a,b\in\mathbb{Z}$ 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.

So, $a=7k$ where $k\in\mathbb{Z}$

$(7k)^2=7b^2\\\\49k^2=7b^2\\\\7k^2=b^2$

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

But if both numbers $a$ and $b$ are divisible by 7, then $\text{gcd}(a,b)=7$ which contradicts our earlier assumption that $\text{gcd}(a,b)=1$ .

Therefore $\sqrt7$ is an irrational number.

8 0

3 years ago