X-2y=5 3x+15y=-6 the graph that correctly represents the given system of equations is graph (b) , and the solution to the system is __ , __ options for the first 1 3 -3 4 -4 options for the second 1 2 -1 -2 1 plss asap doin a mastery test on plato !

Given : x - 2y = 5

Multiplying the entire equation with 3, we get :

3x - 6y = 15 [1]

Given : 3x + 15y = -6 [2]

Subtracting Equation [2] from Equation [1], We get :

⇒ (3x - 6y) - (3x + 15y) = 15 + 6

⇒ -6y - 15y = 21

⇒ -21y = 21

⇒ y = -1

Substituting y = -1 in Equation [1], We get :

⇒ 3x + 6 = 15

⇒ 3x = 9

⇒ x = 3

So, the solution to the system is : x = 3 and y = -1

First Blank : 3

Second Blank : -1

i dont get it. where are the "descriptions"?

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.