Solve the system by the substitution method.

x2 + y2 = 113
x + y = 15
A. {( -8, 7), ( -7, 8)}

B. {( 8, -7), ( 7, -8)}

C. {( 8, 7), ( 7, 8)}

D. {( -8, -7), ( -7, -8)}

Question

Solve the system by the substitution method.

x2 + y2 = 113
x + y = 15
A. {( -8, 7), ( -7, 8)}
	
B. {( 8, -7), ( 7, -8)}
	
C. {( 8, 7), ( 7, 8)}
	
D. {( -8, -7), ( -7, -8)}

anonymous · Answer

@JoannaBlackwelder time for ya next medal lol

joannablackwelder · Answer

Haha! Any thoughts on how to start?

anonymous · Answer

yeah start subbing for the first equation to see wich one imakes it a true statement

joannablackwelder · Answer

Hm, no, that's not what is meant by substitution.

anonymous · Answer

ohhh

joannablackwelder · Answer

|dw:1439922974168:dw| First solve for a variable.

anonymous · Answer

ok this is harder then i thought haha

joannablackwelder · Answer

|dw:1439923058436:dw| Then sub it into the other equation.