1st one is 0
2nd one is -3
3rd one is -2
4th one is 5
Combine like terms, isolate the variable, and make the slope of the variable 1 to find all the answers.
((X1+x2)/2,(y1+y2)/2)
---> ((2+2)/2,(1+4)/2)
---> (2,2.5)
Answer:
x = -10; y = 9
Step-by-step explanation:
(1) 7x + 5y = -25
(2) 5x + 3y = -23 Multiply (1) by 3
(3) 21x + 15y = -75 Multiply (2) by 5
(4) 25x + 15y = -115 Subtract (3) from (4)
4x = -40 Divide each side by 4
(5) x = -10 Substitute (5) into (2)
5(-10) + 3y = -23
-50 + 3y = -23 Add 50 to each side
3y = 27 Divide each side by 3
y = 9
x = -10; y = 9
Check:
(1) 7(-10) + 5×9 = -25
-70 + 45 = -25
-25 = -25
(2) 5(-10) + 3×9 = -23
50 + 27 = -23
-23 = -23
Answer:
D try B or its either one of that i took the quiz long time ago. so I don't really remember.
