4 years ago

6x+7y=20 Y=2x How do u solve this one ¿

Mathematics

2 answers:

lina2011 [118]4 years ago

4 0

$6x+7y=20\\
y=2x\\\\
6x+7\cdot2x=20\\
6x+14x=20\\
20x=20\\\\
x=1\\\\
y=2\cdot1\\
y=2\\\\
\boxed{(x,y)=(1,2)}
$

Minchanka [31]4 years ago

3 0

If y=2x
7y=14x .

6x+14x=20
20x=20
x being 1 x=1

we found x .
and putting in this problem.

y=2x
y will be 2 , y=2

i am so sorry for my bad english :(

You might be interested in

I need the answers to 1 and 2 please help

Serggg [28]

Answer:

you need to write the article name or a picture of the article to get a correct answer.

Step-by-step explanation:

7 0

3 years ago

Uri paid a landscaping company to mow the lawn. The company changed $74 for the service plus 5% tax. After tax, Uri also include

pochemuha

Answer:

Ok so the answer is 13.7

Step-by-step explanation:

1. x/3 = 74/100

solve the equation above and get 3.7

2. the problem say a 10% tip so add that to 3.7. this equals 13.7

ANSWER: 13.7

4 0

2 years ago

Angle θ is in Quadrant II - and cosθ = −12/13<br><br><br> what is the value of sinθ?

Romashka [77]

The solution is below. The value of the angle can also be found by:

1. Finding sin^-1

2. Since it belongs to quadrant II, the value of the angle will be 180- sin^-1

7 0

3 years ago

Someone pls help me with this question!!!!!!

liraira [26]

Answer:50+24=74

Step-by-step explanation:

8 0

3 years ago

Ik that no one would like to help me with this but my friend goes through depr3ession he is sad his parents fus.s at him and eve

GuDViN [60]

Answer:

I will help him

Step-by-step explanation:

5 0

3 years ago