2 years ago

Solve the following system of equations using elimination: 13x + 5y = 16 2x - 8y = 20

1 answer:

3 0

13x + 5y = 16
2x - 8y = 20

Multiply the equations;

13x + 5y = 16 [x2]
2x - 8y = 20 [x13]

26x + 20y = 32
26x - 104y = 260

Reverse the signs on one equation;

26x + 20y = 32
-26x + 104y = -260

'-26x' gets cancelled, leaving;

20y = 32
104y = -260

20y + 104y = 124y
32 - 260 = -228

124y = -228

y = -228 / 124

y = -1.84

Substitute in one equation and find 'x'.

Hope this helped! :)

You might be interested in

5 - 3x > -19 <br> Can someone please help me

oksano4ka [1.4K]

Answer:

- 3x > -19 -5

- 3x > -24

3x < 24

x < 8

8 0

2 years ago

Eva incorrectly classifies the quotient -(-81/-9) as positive.

NISA [10]

The answer is negative because, ( -81/-9) =(+9). -(+9) = -9. Maybe for got the - sign before the equation

6 0

3 years ago

If sin^2(x) - 2sin(x) = 2, then sin(x) = _____.

alekssr [168]

Let z = sin(x).
.. z^2 -2z = 2
.. z^2 -2z +1 = 3
.. (z -1)² = 3
.. z -1 = ±√3
.. z = 1 -√3 . . . . . the positive solution is extraneous

sin(x) = 1 -√3

3 0

3 years ago

This is congruent triangle proofs and I'm completely lost on how to figure it out so I was hoping you could help me with that.

rusak2 [61]

Answer:sad

Step-by-step explanation:t

3 0

3 years ago

Solve d/14-1/2=1/4 Show your work.

otez555 [7]

I hope this helps you

8 0

3 years ago