Solve each system of equations
Y= x +3
Y=2x+5

x= -2

y= 1

Step-by-step explanation:

x+3=2x+5

x-2x=5-3

-x=2

x= -2

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.