3 years ago

-2x+2y=6 7x-8y=-27 what is the solution

1 answer:

8 0

-2x+2y=6
7x-8y=-27
5x-6y=-21
-x+y=3
6x-7y=-24
6x-7y=-4(-2x+2y)
6x-7y=8x-8y
-6x from both sides:
-7y=2x-8y
add 8y to both sides:
y=2x
-2x+2y=6
2y-6=2x
2y-6=-12
-6-6=-12
y=-3
x=-6

Hope this helps :)

You might be interested in

Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. Whe

sladkih [1.3K]

Hello,

$x_{0}=1200$

$x_{1}=\frac{97}{100}*1200$

$x_{2}=(\frac{97}{100})^2*1200$

$x_{3}=(\frac{97}{100})^3*1200$
...
$x_{n}=(\frac{97}{100})^{n}*1200$

4 0

3 years ago

Read 2 more answers

Eric took a test with 15 questions. he answered 2/5 of the questions correctly, how many did he get wrong?

givi [52]

Answer: 9

3/5's of 15 = 9

7 0

3 years ago

The mold for a cone has diameter of 4 inches and is 6 inches tall what is the volume of the cone mold to the nearest tenth

Nesterboy [21]

The formula for the volume of a cone is
v = ( 1 / 3) h pi r^2
where h is the height of the cone
pi is 3.1416
r is the radius of the cone

since diameter is given
D = 2r
r = D/2 = 4/2 = 2 in

substitute the given
V = (1/3) (6) (3.1416) (2^2)
V = 25.1 cubic in

6 0

3 years ago

Match the measureable quantity given by its formula with the appropriate unit(s).

kompoz [17]

Good morning ☕️

___________________

Step-by-step explanation:

Look at the photo below for the details.