Answer:
63 votes
Step-by-step explanation:
10% of 70 is 7
70-7=63
Answer:56.077
Step-by-step explanation:
The answer should be B using the slope formula.
Answer:
No the relation is not a function
Step-by-step explanation:
This is because there are 2 x factors that have the value of 15. (15,8) and (15,2)
in order to make this a function you would have to change the one of the x factor of the 2 ratios:
(15,8) and (15,2)
Must use quadratic formula (basically completing the square)
so
for an equation
ax^2+bx+c=0
x=
![\frac{-b+/- \sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-b%2B%2F-%20%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
ax^2+bx+c=0
-3x^2-4x-4=0
a=-3
b=-4
c=-4
x=
![\frac{-(-4)+/- \sqrt{(-4)^2-4(-3)(-4)} }{2(-4)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-%28-4%29%2B%2F-%20%5Csqrt%7B%28-4%29%5E2-4%28-3%29%28-4%29%7D%20%7D%7B2%28-4%29%7D%20)
x=
![\frac{4+/- \sqrt{16-48} }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%20%5Csqrt%7B16-48%7D%20%7D%7B-8%7D%20)
x=
![\frac{4+/- \sqrt{-32} }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%20%5Csqrt%7B-32%7D%20%7D%7B-8%7D%20)
x=
![\frac{4+/- (\sqrt{-1})(\sqrt{32}) }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%20%28%5Csqrt%7B-1%7D%29%28%5Csqrt%7B32%7D%29%20%7D%7B-8%7D%20)
x=
![\frac{4+/- (i)(\sqrt{(4)(4)(2)}) }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%20%28i%29%28%5Csqrt%7B%284%29%284%29%282%29%7D%29%20%7D%7B-8%7D%20)
x=
![\frac{4+/- (i)(4\sqrt{2}) }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%20%28i%29%284%5Csqrt%7B2%7D%29%20%7D%7B-8%7D%20)
x=
![\frac{4+/- 4i\sqrt{2} }{-8}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%2B%2F-%204i%5Csqrt%7B2%7D%20%7D%7B-8%7D%20)
x=
![\frac{1+/- i\sqrt{2} }{-2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%2B%2F-%20i%5Csqrt%7B2%7D%20%7D%7B-2%7D%20)
x=
![\frac{1+ i\sqrt{2} }{-2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%2B%20i%5Csqrt%7B2%7D%20%7D%7B-2%7D%20)
or
![\frac{1- i\sqrt{2} }{-2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1-%20i%5Csqrt%7B2%7D%20%7D%7B-2%7D%20)
or
x=
![\frac{-1- i\sqrt{2} }{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-1-%20i%5Csqrt%7B2%7D%20%7D%7B2%7D%20)
or