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1 year ago

Solve the system of equations. I need the answer today x=2-y x-2y-11=0

Mathematics

1 answer:

mel-nik [20]1 year ago

3 0

Answer:

(5, -3)

Step-by-step explanation:

if x=2-y then 2-y-2y-11=0

-3y-9=0

-3y=9

y= -3

x= 2+3=5

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The picture shows a triangular island: Which expression shows the value of c?

anyanavicka [17]

Answer:

c = b / cos 45.

Step-by-step explanation:

cos 45 = b/c

c * cos 45 = b

c = b / cos 45.

5 0

2 years ago

Use proportion to find the answer.

prisoha [69]

Answer

$\boxed {64}$

Detailed Explanation

Let's set up a proportion.

$\frac{3}{4.8} = \frac{40}{x}$

Now that we have set up a proportion we would need to cross multiply.

3*x=3x

40*4.8= 192

Solve for x

$3x=192$

$\frac{192}{3} = 64$

Therefore, the answer would be 64.

5 0

2 years ago

If A+B+C=<img src="https://tex.z-dn.net/?f=%5Cpi" id="TexFormula1" title="\pi" alt="\pi" align="absmiddle" class="latex-formula"

seraphim [82]

Answer:

$a + b + c = \pi \\ = > c= \pi - a - b \\ < = > \tan(c) = \tan(\pi - a - b) = -\tan(a + b)$

Step-by-step explanation:

we have:

$\tan(a) + \tan(b) + \tan(c) \\ = \tan(a) + \tan(b) - \tan(a + b) \\ = \tan( a) + \tan(b) - \frac{ \tan(a) + \tan(b) }{1 - \tan(a) \tan(b) } \\ = \frac{ ( \tan(a) + \tan(b) ) \tan(a) \tan(b) }{ \tan(a) \tan(b) - 1 } (1)$

we also have:

$\tan(a) \tan(b) \tan(c) \\ = - \tan(a) \tan(b) \tan(a + b) \\ = \frac{ -(\tan( a ) + \tan(b) ) \tan(a) \tan(b) }{1 - \tan(a) \tan(b) } \\ = \frac{( \tan(a) + \tan(b)) \tan(a) \tan(b) }{ \tan(a) \tan(b) - 1 } (2)$

from (1)(2) => proven

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2 years ago

What is the surface area of a cube whose edges are 11 inches long?

Dennis_Churaev [7]

Surface area is the total area of the surface. A cube has 6 surface, and each surface is the same. Each surface is a 11 by 11 square. Therefore there will be 6 11in. x 11in. surfaces. The math would be 11x11x6 =726.

8 0

2 years ago

Read 2 more answers

PLSS HELP ME!!! question 3x - 4/5= - 1/2 what is the value of x?

Minchanka [31]

Answer:

x = $\frac{1}{10}$