2 years ago

Solve by substitution 2y=x+1 -2x-y=7

1 answer:

8 0

-2x-y=7
Add 2x to both sides
-y= 2x+7
Multiply both sides by-1
Y= -2x-7

2y=x+1

2(-2x-7)= x+1
-4x -14. =x+1
Add 14 to both sides
-4x=x +15
Subtract x from both sides
-5x=15
X=-3

2y =-3+1
-2y=-2
Y=1

(-3,1)

You might be interested in

What is the solution of x+4/2x-1<0

Vikentia [17]

Answer:

$\large\boxed{ -4$

Step-by-step explanation:

$Domain:\ 2x-1\neq0\to x\neq\dfrac{1}{2}$

$\dfrac{x+4}{2x-1}$

$(x+4)(2x-1)=(x)(2x)+....=2x^2+...\to 2>0\\\\\text{therefore the parabola is op}\text{en up}$

$\text{Look at the picture.}$

$\dfrac{x+4}{2x-1}$

3 0

3 years ago

Read 2 more answers

Which of the following could be a measurement on a scale drawing that has a scale of 2:5?

klemol [59]

Answer:

Step-by-step explanation:

3 0

2 years ago

Use the FOIL method to evaluate the expression

In-s [12.5K]

So u multiply each term in the first parentheses by each term in the second parentheses.

√5 √5 + 6√5-3√5 - 3x6
Now you multiply the numbers which will get u:
5+6√5 - 3√5 - 18
Then subtract:
-13 +3√5 that’s your answer

7 0

2 years ago

Complete this factor tree to find the prime factors of 492

damaskus [11]

Answer:

246

Step-by-step explanation:

next time use a calculator

divide 492 by 2 and you get 246

divide that by 2 and you get 123

and divide that by 3 and you get 41

4 0

2 years ago

Read 2 more answers

Find the value of x so that f(x)=7

3241004551 [841]

Answer:

-3

Step-by-step explanation:

7 0

3 years ago