So 7 x = x2 -18 so you get the quadratic x^2 -7x -18 and then get 2 x -9= -18 and 2 + -9 = -7 so you get (x + 2) ( x - 9) so the positive solution would be x-9 = 0 so x= 9. Hope this helps :)
Answer:
Only:
B. x=7
D. x=0
Step-by-step explanation:
Substitute the answers in the formula and only 7 and 0 will work.
D
-2(-4+c)
-2 x -4= 8
-2 x c= -2c
8-2c
Answer:
I'm not sure but I think in the hundreds.
Step-by-step explanation:
There are about 365 sunrises a year. So that is in the hundreds.
I have no clue, sorry :(
