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marissa [1.9K]
2 years ago
6

CARMEN HAS 18 CONNECTING CUBES. sHE WANTS TO MODEL A HOUSE SHAPED LIKE A RECTANGLE . if THE MODEL HAS A HEIGHT OF ONE CONNECTING

CUBE, HOW MANY DIFFERENT WAYS CAN CARMEN MODEL THE HOUSE USING ALL 18 CONNECTING CUBES.
Mathematics
2 answers:
Tems11 [23]2 years ago
7 0
1 by 18
2 by 9
3 by 6
So 3 ways
iragen [17]2 years ago
5 0
You can divide 18 three ways, 18 divided by 18 is 1, 18 divided by 3 is 6, and 18 divided by 9 is 2, so 3 different ways
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Multiply 3/sqrt17- sqrt2 by which fraction will produce an equivalent fraction with rational denominator
zzz [600]

Answer:

B.

Step-by-step explanation:

To simplify something that looks like \frac{\text{whatever}}{\sqrt{a}-\sqrt{b}} you would multiply the top and bottom by the conjugate of the bottom. So you multiply the top and bottom for this problem I just made by:

\sqrt{a}+\sqrt{b}.

If you had  \frac{\text{whatever}}{\sqrt{a}+\sqrt{b}}, then you would multiply top and bottom the conjugate of \sqrt{a}+\sqrt{b} which is \sqrt{a}-\sqrt{b}.

The conjugate of a+b is a-b.

These have a term for it because when you multiply them something special happens.  The middle terms cancel so you only have to really multiply the first terms and the last terms.

Let's see:

(a+b)(a-b)

I'm going to use foil:

First:  a(a)=a^2

Outer: a(-b)=-ab

Inner:  b(a)=ab

Last:    b(-b)=-b^2

--------------------------Adding.

a^2-b^2

See -ab+ab canceled so all you had to do was the "first" and "last" of foil.

This would get rid of square roots if a and b had them because they are being squared.

Anyways the conjugate of \sqrt{17}-\sqrt{2} is

\sqrt{17}+\sqrt{2}.

This is the thing we are multiplying and top and bottom.

3 0
3 years ago
Read 2 more answers
How to answer <br> 100x^2+60x+9
iVinArrow [24]

Answer:

Step-by-step explanation:

Rewrite

100

x

2

100

x

2

as

(

10

x

)

2

(

10

x

)

2

.

(

10

x

)

2

+

60

x

+

9

(

10

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2

+

60

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9

Rewrite

9

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as

3

2

3

2

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(

10

x

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2

+

60

x

+

3

2

(

10

x

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2

+

60

x

+

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2

Check the middle term by multiplying

2

a

b

2

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b

and compare this result with the middle term in the original expression.

2

a

b

=

2

⋅

(

10

x

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⋅

3

2

a

b

=

2

⋅

(

10

x

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⋅

3

Simplify.

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b

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Factor using the perfect square trinomial rule

a

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2

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2

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b

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(

a

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and

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3

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3

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(

10

x

+

3

)

2

3 0
2 years ago
Help! Clear the fractions
I am Lyosha [343]

Answer:

x = - \frac{27}{20}

Step-by-step explanation:

Given

\frac{5}{6} x + 2 = \frac{7}{8}

Multiply through by 24 ( the LCM of 6 and 8 ) to clear the fractions

20x + 48 = 21 ( subtract 48 from both sides )

20x = - 27 ( divide both sides by 20 )

x = - \frac{27}{20}

6 0
2 years ago
7.5 x (2.6 + 2.4) - 7.5
Alexandra [31]

Answer:

hope this helped!

5 0
2 years ago
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Graph this line using the slope and y-intercept: y = 1/8x + 4<br> (1/8 is a fraction)
Tems11 [23]

Answer:

Two points, (0,4) & (8,5)

Step-by-step explanation:

In this equation, we can easily find the first point by looking at the +4 in this equation. This should automatically signal to you that the point is (0,4)

Now, we have to look at the 1/8x in the equation.

This 1/8 means that the slope is 1/8!

Now we use the slope and to rise/run to find our next point

We go up 1 from 4 (this is the rise) to get to 5 on the y-axis

Next, we go over 8 horizontally to get to 8 for your x-axis point.

So therefore, our next point is, (8,5)

You can use this rise/run system infinitely and is very useful

5 0
2 years ago
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