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3 years ago

What is four ninths of eighteen

Mathematics

1 answer:

Nookie1986 [14]3 years ago

5 0

First,divide 18 by 9.You get 2.That's 1/9,so just multiply 2 by 4(which is 8),and you get you're answer.

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Please Help!!!<br> I know the answer but need work.

hammer [34]

How do you know the answer if you don't have the work?

2/3(x+1/8) =1/6(x)
2/3×x+2/3×1/8=1/6(x)
2/3(x)+1/12=1/6(x)
2/3(x)-2/3(x)+1/12=1/6(x)-2/3(x)
1/12=1/6(x)-2/3(x)
1/12=1/6(x)-4/6(x)
1/12=-3/6(x)
1/12÷-3/6=-3/6(x)÷-3/6
-1/6=x

3 0

2 years ago

Find the volume of each sphere. Round to the nearest tenth.

Ray Of Light [21]

Your answer should be 6043.99

6 0

2 years ago

How to find S12 of the following series

11111nata11111 [884]

I think it's a3D unless u tell me what u mean by finding S12

4 0

2 years ago

Rationalize the denominator of $\frac{5}{2+\sqrt{6}}$. The answer can be written as $\frac{A\sqrt{B}+C}{D}$, where $A$, $B$, $C$

horrorfan [7]

Answer:

$A +B+C+D = 3$ is the correct answer.

Step-by-step explanation:

Given:

$\frac{5}{2+\sqrt{6}}$

To find:

$A+B+C+D = ?$ if given term is written as following:

$\frac{A\sqrt{B}+C}{D}$

<u>Solution:</u>

We can see that the resulting expression does not contain anything under $\sqrt$ (square root) so we need to rationalize the denominator to remove the square root from denominator.

The rule to rationalize is:

Any term having square root term in the denominator, multiply and divide with the expression by changing the sign of square root term of the denominator.

Applying this rule to rationalize the given expression:

$\dfrac{5}{2+\sqrt{6}} \times \dfrac{2-\sqrt6}{2-\sqrt6}\\\Rightarrow \dfrac{5 \times (2-\sqrt6)}{(2+\sqrt{6}) \times (2-\sqrt6)} \\\Rightarrow \dfrac{10-5\sqrt6}{2^2-(\sqrt6)^2}\ \ \ \ \ (\because \bold{(a+b)(a-b)=a^2-b^2})\\\Rightarrow \dfrac{10-5\sqrt6}{4-6}\\\Rightarrow \dfrac{10-5\sqrt6}{-2}\\\Rightarrow \dfrac{-5\sqrt6+10}{-2}\\\Rightarrow \dfrac{5\sqrt6-10}{2}$

Comparing the above expression with:

$\frac{A\sqrt{B}+C}{D}$

A = 5, B = 6 (Not divisible by square of any prime)

C = -10

D = 2 (positive)

GCD of A, C and D is 1.

So, $A +B+C+D = 5+6-10+2 = \bold3$

5 0

3 years ago

Heeeelp just need 1 and 3

Harlamova29_29 [7]

Answer: I think the answer is. x=y*z I dont know what the verbles are but thats what I got. ANd can you zoom in a bit?

Step-by-step explanation:

4 0

2 years ago