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FromTheMoon [43]
3 years ago
12

one section of an auditorium has 12 rows of seats each row has 13 seats what is the total number of seats in that section

Mathematics
2 answers:
Svet_ta [14]3 years ago
8 0
12 x 13 =156
There is 156 seats in that section
max2010maxim [7]3 years ago
5 0
The answer is 156 hope this helpes
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-32 +(-18) =<br> Show step by step to answer
Nuetrik [128]

Answer:

-50

Step-by-step explanation:

  -32 + ( -18 )

= - 32 - 18

= -50

Hope this helps!

8 0
2 years ago
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Leno4ka [110]
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3 years ago
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3 years ago
Prove algebraically that the straight line with equation x=2y+5 is a tangent to the circle with equation x^2+y^2=5
zmey [24]

Differentiate both sides of the equation of the circle with respect to x, treating y=y(x) as a function of x:

x^2+y^2=5\implies2x+2y\dfrac{\mathrm dy}{\mathrm dx}=0\implies\dfrac{\mathrm dy}{\mathrm dx}=-\dfrac xy

This gives the slope of any line tangent to the circle at the point (x,y).

Rewriting the given line in slope-intercept form tells us its slope is

x=2y+5\implies y=\dfrac12x-\dfrac52\implies\mathrm{slope}=\dfrac12

In order for this line to be tangent to the circle, it must intersect the circle at the point (x,y) such that

-\dfrac xy=\dfrac12\implies y=-2x

In the equation of the circle, we have

x^2+(-2x)^2=5x^2=5\implies x=\pm1\implies y=\mp2

If x=-1, then -1=2y+5\implies y=-3\neq2, so we omit this case.

If x=1, then 1=2y+5\implies y=-2, as expected. Therefore x=2y+5 is a tangent line to the circle x^2+y^2=5 at the point (1, -2).

7 0
3 years ago
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Help pretty please :]
Vaselesa [24]

Answer:

<h2>A's wrong.................(I Think)</h2>

Step-by-step explanation:

i think its D is B and D the same?

7 0
2 years ago
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