All categories

3 years ago

Solve the system of equations below by elimination. (Show your work) 2x+3y=1 5x+7y=3

Mathematics

1 answer:

nikdorinn [45]3 years ago

8 0

Answer:

-2x+2y+3z=0

-2x-y+z=-3

2x+3y+3z=5

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

-2x+2y+3z=0

-2x-y+z=-3

---------------- Subtract

3y + 2z = 3 Eqn A

=========================

-2x-y+z=-3

2x+3y+3z=5

---------------- Add

2y + 4z = 2

6y + 4z = 6 Eqn A times 2

------------------------------------ Subtract

-4y = -4

y = 1

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

z = 0

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

x = 1

You might be interested in

What number should be added to 7/12 to get 4/15?

DENIUS [597]

Answer:

Step-by-step explanation:

Let the number = x.

We are trying to find out what number (x) we would need to add to 7/12 to get 4/15

$\frac{7}{12} + x = \frac{4}{15}$

Subtract 7/12 from both sides.

$x = \frac{4}{15} - \frac{7}{12}$

We need to make the denominators of the fractions the same.

$\frac{4}{15} = \frac{16}{60}$

$\frac{7}{12} = \frac{35}{60}$

So,

$x = \frac{16}{60} - \frac{35}{60} = - \frac{19}{60}$

6 0

3 years ago

Question 16

Nadya [2.5K]

Answer:

8milliliters for 40 pounds

Step-by-step explanation:

7/35=0.2

0.2*40=8

8 0

3 years ago

A dairy scientist is testing a new feed additive. She chooses 13 cows at random from a large population. She randomly assigns no

Darina [25.2K]

Answer:

is that hindi or something.

Step-by-step explanation:

7 0

3 years ago

Help meeèeeeeeeeeeeee

mamaluj [8]

The answer is B your welcome

3 0

3 years ago

What is the simplified form of the expression? 7r - 8r + 13 -2r + 5? Please help me

ArbitrLikvidat [17]

Answer:

- 3r + 18

Step-by-step explanation:

7r - 8r - 2r + 13 + 5 = 7r - 10r + 18

6 0

3 years ago