Answer:D. X= -9 or x= 1
X2 + 8x - 9 = 0
Answer:
x=1 or x=-9
Step-by-step explanation:
x^2 + 8x − 9 = 0 (8x=9x-x)
x^2 - x+9x-9=0
x(x-1)+9(x-1)=0
(x-1)(x+9)=0
x-1=0 or x+9=0,then
39.75
First, subtract 50 from both sides
200z + 50 - 50 = 8000 - 50
200z = 7950
Then isolate the variable by dividing both sides by 200
200z/200 = 7950/200
z=39.75
2.7
if you round 2.65 to the nearest tenth, it is 2.7
