<span>f(x) =-(x+9)(x-21)
Manipulating algebrically,
We get,
</span>f(x) =-(x+9)(x-21)
= -(x^2 -21x + 9x - 189)
= -(x^2 -12x - 189)
= -x^2 + 12x + 189
Axis of symmetry = -b/2a
plugging the values,
x = -12/-2
= 6
Answer:
Step-by-step explanation:
So angle 3 and 49 are supplementary angels.
So,
m/3 + 49 = 180
m/3 = 180 - 49 = 131
As angel 1 = angel 49
So, the answer will be:
m
Answer:
Well by looking at the products,it must be sodium bicarbonate (NaHCO3)
Step-by-step explanation:
but then sodium bicarbonate does not remove permanent hardness of water,that compound is washing soda(Na2CO3) which should not be confused with NaHCO3. So as it would appear,the premise of the question is wrong but there is a compound that reacts with HCl to give those products
Answer:
$ 33.06
Step-by-step explanation:
I Hope this helps :))))
Answer:
D: 9, 12, 15
Step-by-step explanation:
Okay, this one is a very simple and a not so hard question. I understand that teachers prefer kids to not lay out all the terms, but in this case, it won´t be horrible in doing so!
Were going to plug 6 into n, and that will make the formula look like,
F(6)=3(6)-9
18-9=9 so the 6th term is 9
Plug in 7=
F(7)=3(7)-9
21-9=12
The 7th term is 12
Plug in 8=
F(8)=3(8)-9
24-9=15 8th term is 15
That means terms 6, 7, and 8 are: 9, 12, 15