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Artyom0805 [142]
3 years ago
8

Solve 4x-y=-5 -2x+3y=10​

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
4 0
(x,y) = (9/2,8) thats the answer
allsm [11]3 years ago
3 0

Answer:

(x,y) =(7/2,4)

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Find the exact value of cos (-270).
djyliett [7]

Answer:

Step-by-step explanation:

Assuming this is in degrees, it is actually 0.

8 0
3 years ago
Idk this is supper hard
vlabodo [156]

Answer:

The equation of the line is:  y = x + 4

Step-by-step explanation:

When we are given two points passing through a line, we can find the equation of the line by using two - point form.

Two - point form:    $ \frac{\textbf{y - y}_\textbf{1}}{\textbf{y}_{\textbf{2}} \textbf{-} \textbf{y}_{\textbf{1}}} = \frac{{\textbf{x - x}_\textbf{1}}}{\textbf{x}_{\textbf{2}} \textbf{-} \textbf{x}_{\textbf{1}}    }$

where $ (x_1, y_1) \hspace{3mm} \& \hspace{3mm} (x_2, y_2) $ are the points passing through the line.

Here, let us take two points (can be any two):

$(x _1, y_1) = (1, 5) $ and

$ (x_2, y_2) = (5, 9) $

Therefore, we have:

$ \frac{y - 5}{9 - 5} = \frac{x - 1}{5 - 1} $

$ \iff \frac{y - 5}{4} = \frac{x - 1}{4} $

$ \iff y - 5 = x - 1 $

$ \implies y = x - 1 + 5 $

$ \implies y = \textbf{x + 4} $ which is the required answer.

4 0
3 years ago
Convert the complex number z = -12 + 5i from rectangular form to polar form.​
Paha777 [63]

Answer:

z=13(\cos 157\degree +i\sin157\degree)

Step-by-step explanation:

The given complex number is

z=-12+5i

The polar form of this complex number is;

z=r(\cos \theta +i\sin \theta), where

r=\sqrt{(-12)^2+5^2}

r=\sqrt{144+25}=\sqrt{169}=13

and

\theta =\tan^{-1}(\frac{5}{-12})

This implies that;

\theta=157\degree to the nearest degree.

Hence the polar form is

z=13(\cos 157\degree +i\sin157\degree)

7 0
4 years ago
if a pair of standard dice are rolled what is the probability that one die shows a six but not both of them. reduced fraction an
Novay_Z [31]

Answer:

P=\frac{5}{18}

Step-by-step explanation:

we know that

The probability of an event is the ratio of the size of the event space to the size of the sample space.  

The size of the sample space is the total number of possible outcomes  

The event space is the number of outcomes in the event you are interested in.  

so  

Let

x------> size of the event space

y-----> size of the sample space  

if a die is rolled the sample space is

\{1,2,3,4,5,6\}

if two dice rolled the sample space is

\{1,2,3,4,5,6\}*\{1,2,3,4,5,6\}

so

The possible pairs are

y=6*6=36

The size of the event space x is

\{(1,6),(2,6),(3,6),(4,6),(5,6),(6,1),(6,2),(6,3),(6,4),(6,5)\}

x=10

P=\frac{x}{y}

substitute

P=\frac{10}{36}

Simplify

P=\frac{5}{18}

6 0
3 years ago
Find the measure of the missing angle
Anestetic [448]

Answer: b=112 degrees and c=68

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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