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3 years ago

Someone help me................

Mathematics

2 answers:

Vilka [71]3 years ago

4 0

Alright i think it is 6.8

galina1969 [7]3 years ago

4 0

Answer:

$-z^{2} =-25$

Step-by-step explanation:

The value of z is given as $-5$

The expression is given as $-z^{2}$

Substitute the value of z in the expression:

$=-(-5)^{2}$ {add the value inside the bracket to avoid mistakes}

$=-1$ × $(-5)^{2}$

$=-1$ × $((-5)$ × $(-5))$

$=-25$

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Someone answer this Please

Ainat [17]

The given triangle is a Right angled triangle,

So, by applying Pythagoras theorem :

${c}^{2} = {12}^{2} + 9 {}^{2}$

=》

${c}^{2} = 144 + 81$

=》

${c}^{2} = 225$

=》

${c} = \sqrt{225}$

=》

$c = 15$

hence, value of c = 15 mi

4 0

3 years ago

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Find the equation of the lines parallel and perpendicular to the line 5x+2y=12 through the point (-2,3)

muminat

Answer:

The equation of line parallel to given line and passing through points ( - 2 , 3 ) is 5 x + 2 y + 4 = 0

The equation of line perpendicular to given line and passing through points ( - 2 , 3 ) is 2 x - 5 y + 19 = 0

Step-by-step explanation:

Given equation of line as :

5 x + 2 y = 12

or, 2 y = - 5 x + 12

or , y = $\frac{-5}{2}$ x + $\frac{12}{2}$

Or, y = $\frac{-5}{2}$ x + 6

∵ Standard equation of line is give as

y = m x + c

Where m is the slope of line and c is the y-intercept

Now, comparing given line equation with standard eq

So, The slope of the given line = m = $\frac{-5}{2}$

Again,

The other line if passing through the points (- 2 , 3 ) And is parallel to given line

So, for parallel lines condition , the slope of both lines are equal

Let The slope of other line = M

So, M = m = $\frac{-5}{2}$

∴ The equation of line with slope M and passing through points ( -2 , 3) is

y = M x + c

Now , satisfying the points

So, 3 = $\frac{-5}{2}$ × ( - 2 ) + c

or, 3 = $\frac{10}{2}$ + c

Or, 3 = 5 + c

∴ c = 3 - 5 = - 2

c = - 2

So, The equation of line with slope $\frac{-5}{2}$ and passing through points ( -2 , 3)

y = $\frac{-5}{2}$ x - 2

or, 2 y = - 5 x - 4

I.e 5 x + 2 y + 4 = 0

Similarly

The other line if passing through the points (- 2 , 3 ) And is perpendicular to given line

So, for perpendicular lines condition,the products of slope of both lines = - 1

Let The slope of other line = M'

So, M' × m = - 1

Or, M' × $\frac{-5}{2}$ = - 1

Or, M' = $\frac{-1}{\frac{-5}{2}}$

Or, M' = $\frac{2}{5}$

∴ The equation of line with slope M and passing through points ( -2 , 3) is

y = M' x + c'

Now , satisfying the points

So, 3 = $\frac{2}{5}$ × ( - 2 ) + c'

or, 3 = $\frac{- 4}{5}$ + c'

Or, 3 × 5 = - 4 + 5× c'

∴ 5 c' = 15 + 4

or, 5 c' = 19

Or, c' = $\frac{19}{5}$

So, The equation of line with slope $\frac{2}{5}$ and passing through points ( -2 , 3)

y = $\frac{2}{5}$ x + $\frac{19}{5}$

y = $\frac{2 x + 19}{5}$

Or, 5 y = 2 x + 19

Or, 2 x - 5 y + 19 = 0

Hence The equation of line parallel to given line and passing through points ( - 2 , 3 ) is 5 x + 2 y + 4 = 0

And The equation of line perpendicular to given line and passing through points ( - 2 , 3 ) is 2 x - 5 y + 19 = 0

Answer

4 0

3 years ago

Can anyone help with this pleases

Dominik [7]

The answer is /6 radians. I looked up the unit circle hope this helps :)

5 0

3 years ago

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The Snack Shack is making a batch of trail mix. They use 9 1/3 pounds of granola, 9 1/3 pounds of nuts, and 9 1/3 pounds of yogu

Leokris [45]

What goes into the bowl . . .

-- granola . . . 9-1/3 pounds
-- nuts . . . . . 9-1/3 pounds
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How much is in the bowl all together ?

 (9-1/3) + (9-1/3) + (9-1/3) = 27-3/3 = 28 pounds .

After stirring, mixing, shaking, and resting, how much is
still in the bowl ?

 Still 28 pounds. Nothing else went in, and nothing came out.

After a month, nobody has come into the store yet asking to buy
28 pounds of trail mix. So before it spoils or gets soggy, they decide
to split it up into 14 smaller packages, and see if more people will
buy smaller packages.

They make all of the small packages exactly equal.
How much trail mix is in each one ?

 (28 pounds) divided by (14 packages) = 2 pounds/package

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3 years ago

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Nostrana [21]

Answer:

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Step-by-step explanation:

3 0

3 years ago

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