All categories

3 years ago

50 POINTS!! WILL MARK BRAINLIEST!! SHOW ALL WORK!!

Mathematics

1 answer:

Sav [38]3 years ago

4 0

Answer:

x=5, y=-4

Step-by-step explanation:

2x+9y = -26

-3x-7y = 13

Multiply the first equation by 3

3(2x+9y = -26)

6x +27y = -78

Multiply the second equation by 2

2(-3x-7y = 13)

-6x -14y = 26

Add these two equations together

6x +27y = -78

-6x -14y = 26

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

13y = -52

Divide by 13

13y/13 = -52/13

y = -4

Now we need to find x

2x+9y = -26

2x+9(-4) = -26

2x-36=-26

Add 36 to each side

2x-36+36 = -26+36

2x=10

Divide by 2

2x/2 =10/2

x=5

You might be interested in

Two different box-filling machines are used to fill cereal boxes on an assembly line. The critical measurement influenced by the

defon

Answer:

0.1981

Step-by-step explanation:

See attachment for calculation

5 0

3 years ago

The following statement is either true (in all cases) or false (for at least one example). If false, construct a specific e

matrenka [14]

Answer:

False, counterexample below

Step-by-step explanation:

Denote the unit vectors of R^3 by $e_1=(1,0,0), e_2=(0,1,0), e_3=(0,0,1)$ . Now consider $v_1=e_1, v_2=2e_1$ and $v_3=e_3$ . We have that $v_1, v_2,v_3 \in \mathbb{R}^3$ . Also, the vector $v_3$ is not a linear combination of $v_1, v_2$ because any linear combination of these two vectors will have third coordinate zero, but v_3 has third coordinate 1 so they can't be equal.

However, the set $\{v_1, v_2,v_3\}$ is not linearly independent, because $2v_1-v_2+0v_3=0$ is a non-trivial linear combination of these vectors that equals zero.

4 0

3 years ago

HELP I WILL GIVE BRAINLIEST!

bearhunter [10]

Answer:

Cant see the grapg but i would guess and say C(2014) i guess

Step-by-step explanation:

3 0

3 years ago

Which rectangular equation is equivalent to the polar equation r csc theta=8?

Drupady [299]

Rectangular and polar forms are two forms of equations that translates to plot. In this case, the two forms are convertible to each other by the expressions:

r sin theta = y
r cos theta = x
x2 + y2 = r2

we are given the polar expression r csc theta = 8 and is asked to convert to rectangular form.

in this case, csc theta is equal to 1/ sin theta. thys
r / sin theta = 8

in order to make use of the equations above, then

we multiply r to both numerator and denominator in the left side, that is
r^2 / r sin theta = 8
x2+y2 / y = 8
x 2 + y2 = 8y

3 0

3 years ago

What was the range of the snowfall in Denver?

Mama L [17]

9.2 - 4.8 Your answer is 4.4

4 0

3 years ago

Read 2 more answers