$\left \{ {{2x+y=7\ \ | *4} \atop {3x-4y=5}} \right. \\\\ \left \{ {{8x+4y=28} \atop {3x-4y=5}} \right. \\+----\\Addition\ method\\\\
11x=33\ \ \ | divide\ by\ 11\\
x=3\\\\y=7-2x\\
y=7-2*3=7-6=1\\\\Solution:\\ \left \{ {{y=1} \atop {x=3}} \right.$

7 0

2 years ago

What is the simplified form of this expression? (0.2)^5

Sidana [21]

Its 0.00032 thats the answer

8 0

2 years ago

What is the solution to the equation below?

Ghella [55]

Answer:

$x= 4$

Step-by-step explanation:

$\frac{\sqrt{2x}}{\sqrt{x-2}\:}=2$ [ bring √(x - 2) to the opposite side ]

$\sqrt{2x} = 2\sqrt{x-2}$

$(\sqrt{2x} )^{2} = (2\sqrt{x-2})^2$ [ square both sides ]

$2x = 4(x-2)$

$2x=4x-8$

$2x - 4x = -8$

$-2x = -8$

$x= 4$

6 0

2 years ago

Read 2 more answers

Which system of inequalities is shown?

Svetradugi [14.3K]

Answer:

y<x

y<4

Step-by-step explanation:

this is because the first line is passing through the point 4 on the y axis but the line drawn isn't a solid line therefore the answer will just be y<4, not less than or equal to.

while for the second line it's cutting the graph into two equal parts,the shaded part represents y<x you can prove it by getting two points on that side of the graph let's say (-5,5)

this will be -5<5..which is right.

I hope this helps

6 0

2 years ago