We can check by subbing in the values.
7x + 2y = -7
(7,9).....x = 7 and y = 9
now we sub
7(7) + 2(9) = -7
49 + 18 = -7
67 = -7 (incorrect)....therefore, (7,9) is NOT a solution for this equation
Answer:
7
Step-by-step explanation:
if you add 7 to -5 you get 2
2x² +5x -3
is your answer
hope this helps
FOIL = first, outside, inside last
F(-5) just means that your substituting the number -5 for every x value. So if you have x+1 this would be -5+1 which is -4
