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3 years ago

What is the Value of X please help!

Mathematics

1 answer:

Brums [2.3K]3 years ago

4 0

Answer:

x = 7cm

Step-by-step explanation:

$\frac{36}{6} = \frac{42}{x}\\\\6 = \frac{42}{x}\\\\x = \frac{42}{6} = 7$

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Graph the equation by plotting three

7nadin3 [17]

Answer:

(0,7.5) (1,10) (2,12.5)

Step-by-step explanation:

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3 years ago

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Solve the equation<br> 8.3v = -5.1

Mrrafil [7]

Answer:

v= -0.61445783132

Step-by-step explanation:

Divide both sides by 8.3

-5.1 ÷ 8.3= -0.61445783132

8.3v ÷ 8.3= v

So, v=-0.61445783132

8.3v ÷ 8.3= v

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3 years ago

Which expression is equivalent to 15 y - 8 y ?

siniylev [52]

Answer:

D. The expression 5 y plus 2 y is equivalent to 15 y minus 8 y.

Step-by-step explanation:

15y - 8y = 7y

5y + 2y = 7y

This means that they are similar.

If this answer is correct, please make me Brainliest!

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3 years ago

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A company is constructing an open-top, square-based, rectangular metal tank that will have a volume of 34.5 ft3. what dimensions

____ [38]

Answer:

$l \approx 3.3\,ft$ , $x = 3.2\,ft$

Step-by-step explanation:

The equations of volume and surface area are presented below:

$34.5 = l^{2}\cdot x$

$A_{s} = 2\cdot l^{2} + 4\cdot l \cdot x$

The length of the tank is:

$x = \frac{34.5}{l^{2}}$

The expression fo the surface area is therefore simplified into an univariable form:

$A_{s} = 2\cdot l^{2} + 4\cdot \left(\frac{34.5}{l} \right)$

$A_{s} = 2\cdot l^{2} + \frac{138}{l}$

The first and second derivatives of the expression are, respectively:

$A_{s}' = 4\cdot l -\frac{138}{l^{2}}$

$A_{s}'' = 4 +\frac{276}{l^{3}}$

The first derivative is equalized to zero and length of the square side is now found:

$4\cdot l -\frac{138}{l^{2}} = 0$

$4\cdot l^{3}-138 = 0$

$l^{3} = \frac{138}{4}$

$l = \sqrt[3]{\frac{138}{4} }$

$l \approx 3.3\,ft$

Now, the second derivative offers a criteria to determine if solution leads to an absolute minimum:

$A_{s}'' = 4 + \frac{276}{(3.3\,ft)^{3}}$

$A_{s}'' = 11.7$ (Absolute minimum)

The depth of the tank is:

$x = \frac{34.5\,ft^{3}}{(3.3\,ft)^{2}}$

$x = 3.2\,ft$

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3 years ago

Geomtry plzzz help 15 points

siniylev [52]

Answer:

Step-by-step explanation:

they give you xz, and they want half, so just divide 38 by 2

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3 years ago