3 years ago

Find the value of 2x-yi fx+y=8and4x-y=22

Mathematics

1 answer:

Alexeev081 [22]3 years ago

5 0

Answer:

Step-by-step explanation:

Given

$x+y=8\\ \\4x-y=22$

Add these two equations:

$x+y+4x-y=8+22\\ \\5x=30\\ \\x=6$

Substitute it into the first equation:

$6+y=8\\ \\y=8-6\\ \\y=2$

Then

$2x-y=2\cdot 6-2=12-2=10$

You might be interested in

How long does it take the ball to hit the ground when dropped from 50ft.?

bixtya [17]

I hope it's about 1.8 sec

4 0

3 years ago

CRACK the CODE

Studentka2010 [4]

Answer:

yea i dont know this one bro

Step-by-step explanation:

4 0

3 years ago

Given the equation 2X +4/3 Y equals one and Y -9/13 x=9 by what Vector would you multiply the first equation so that combining t

Mila [183]

Answer: Option B

B. $\frac{9}{26}$

Step-by-step explanation:

We have the following equations:

$2x + \frac{4}{3}y = 1$ (1)

$y -\frac{9}{13}x=9$ (2)

Let us call "a" the coefficient of the variable x in the first equation and call "b" the coefficient of the variable x in the second equation.

Then we must multiply the number "a" by a value z such that when adding $az + b$ the result is zero. $a = 2$

$b = -\frac{9}{13}$

$2z-\frac{9}{13} = 0$

We solve the equation for z

$2z=\frac{9}{13}$

$z=\frac{9}{26}$

The first equation must be multiplied by a value of $\frac{9}{26}$

4 0

3 years ago

A train traveled 317 miles in 10 hours. At this rate, how many miles will the train travel in 2 1/2 hours

Evgen [1.6K]

Answer: 79.25 miles

Ok done. Thank to me :>

8 0

2 years ago

Find a quotient of 75 and 4⅞<br>plzz help

Anastaziya [24]

Answer:

The answer is 15 5/13

Step-by-step explanation:

7 0

3 years ago

Find the value of 2x-yi fx+y=8and4x-y=22​

Find the value of 2x-yi fx+y=8and4x-y=22