3 years ago

-3x-4y=-2 and y=2x-5. What is y? *

Mathematics

1 answer:

givi [52]3 years ago

4 0

Answer:

Step-by-step explanation:

The easiest way to do this is to solve for x first, then y.

Plug the second equation (y = 2x - 5) into the first equation (-3x - 4y = -2). This will give you -3x - 4(2x - 5) = -2. Solve for x.

-3x - 4(2x - 5) = -2

-3x - 8x + 20 = -2

-11x = -22

x = 2

Now, you can plug in the x-value into the second equation.

y = 2(2) - 5

y = 4 - 5

y = -1

You might be interested in

Find the distance between the points (1,8) and (9, 2).

grin007 [14]

Answer:

$distance = \sqrt{(x_{1} -x_{2})^2+(y_{1} -y_{2})^2 }\\\\$

$=\sqrt{(9-1)^2+(2-8)^2 }\\\\=\sqrt{8^2 + 6^2}\\\\=\sqrt{64 +36 }\\\\=\sqrt{100} = 10units$

6 0

3 years ago

Tennis balls cost 7$ for a can of 3. Steve gives the cashier $40 to buy balls and receives $12 in change. How many tennis balls

Keith_Richards [23]

4 cans. 12 tennis balls.

6 0

3 years ago

2x2-3 evaluate each expression. Show your work

nirvana33 [79]

Answer:

Step-by-step explanation:

2x2 = 4

4-3=1

5 0

3 years ago

Triangle X Y Z is shown. Angle X Y Z is 51 degrees and angle Y Z X is 76 degrees. The length of X Z is 2.6, the length of X Y is

Novay_Z [31]

Answer:

3.2 units

Step-by-step explanation:

Use the law of sines

z/sin 76 = 2.6/sin 51

z = 2.6 sin 76/sin 51 = 3.2

4 0

3 years ago

Please solve from A thru D. Thanks

Mashutka [201]

The unkown side legnth is 9 centimeteres long all you had to do was subtract all the numbers from 44 and what your left with is the unknown side.

6 0

3 years ago