3 years ago

Solve the equation with substitution 3x-2y=9 Y=2x-7

1 answer:

3 0

$3x-2y=9 \\
y=2x-7 \\ \\
\hbox{substitute 2x-7 for y in the 1st equation:} \\
3x-2(2x-7)=9 \\
3x-4x+14=9 \\
-x+14=9 \ \ \ |-14 \\
-x=-5 \ \ \ |\times (-1) \\
x=5 \\ \\
y=2x-7=2 \times 5-7=10-7=3 \\ \\
\boxed{(x,y)=(5,3)}$

You might be interested in

3/5 divided by 1/3 please say how you get that answer

kodGreya [7K]

3/4 divided by 1/5 = 3 3/4

Hope that helps :)

6 0

3 years ago

Which one should I choose

bulgar [2K]

Answer:

I believe the answer is 12x 5

5 0

3 years ago

Read 2 more answers

If you know can you please help me??

Nezavi [6.7K]

0.42 because i said so

4 0

3 years ago

A circle has a radius of 12 inches. Find the length of the arc intercepted by a central angle of 120 degrees to the nearest tent

OlgaM077 [116]

Answer:

25.12 inches

Step-by-step explanation:

We have given the radius of the circle =12 inches

The central angle intercepted by the arc =120°

We have to find the length of the arc

So length of the arc is given by $2\pi \times r\times \frac{central\ angle}{360}$

$=\frac{2\times \pi \times 12\times 120}{360}=25.12inches$

So the length of the arc will be 25.12 inch

3 0

3 years ago

Divide 2x2 +5x+2 by 2x+1

Serggg [28]

the answer is [ x + 2 ]

8 0

2 years ago