3 years ago

What is the solution to this system of linear equations 2x +y =1 3x -y= -6

Mathematics

2 answers:

Marta_Voda [28]3 years ago

7 0

Answer:

x= -1 y=3

Step-by-step explanation:

irina1246 [14]3 years ago

3 0

Answer:

x = -1

y = 3

Step-by-step explanation:

2x +y =1 3x -y= -6

Add the two equations together to eliminate y

2x +y =1

3x -y= -6

------------------

5x = -5

Divide by 5

5x/5 = -5/5

x = -1

2x+y = 1

2(-1) +y = 1

-2 +y =1

Add 2 to each side

y = 1+2

y =3

You might be interested in

Write the sentence as an inequality The sum of twice a number n and 8 is at most 25

Marta_Voda [28]

$2n + 8 \leqslant 25$

5 0

4 years ago

Read 2 more answers

Transforme em π rad : a)30° b)40° c)45° d) 50°

Roman55 [17]

Answers:

a) $\frac{1}{6} \pi rad$

b) $\frac{2}{9} \pi rad$

c) $\frac{1}{4} \pi rad$

d) $\frac{5}{18} \pi rad$

Step-by-step explanation:

In this case we are dealing with angles, which can be expressed in degrees ( $\°$ ) or radians ( $rad$ ).

Now, before making the conversions we have to know the equivalence between degrees and radians:

$180 \°=1 \pi rad$

Taking this information into account, let's begin with the answers:

a) $30\° \frac{1 \pi rad}{180 \°}=\frac{1}{6} \pi rad$

b) $40\° \frac{1 \pi rad}{180 \°}=\frac{2}{9} \pi rad$

c) $40\° \frac{1 \pi rad}{180 \°}=\frac{1}{4} \pi rad$

d) $50\° \frac{1 \pi rad}{180 \°}=\frac{5}{18} \pi rad$

3 0

4 years ago

mrs.roberts bought 4 student movie tickets and one adult ticket that cost $12. write an expression to represent the total cost o

SpyIntel [72]

I think is 12. i am not so sure . but i think it is

7 0

4 years ago

Read 2 more answers

Scores on a standardized test are normally distributed with a mean of 250 and a standard a deviation of 20. Approximately what p

masha68 [24]

Answer:

You can't answer this properly without more data.

5 0

3 years ago

Which sets of measurements could be the interior angle measures of a a triangle?

lora16 [44]

Answer:

A, B, E

Step-by-step explanation:

8 0

3 years ago