Answer:
Step-by-step explanation:
12 / v....when v = 2
12 / 2 = 6 <==
Answer:
1.75
c
+
2.25
a
=
1083.00
now we still know, that
a
=
508
−
c
so we can substitute it into the second formula
1.75
c
+
2.25
(
508
−
c
)
=
1083
now its just simple algebra
1.75
c
+
1143
−
2.25
c
=
1083
60
=
0.5
c
so:
c
=
120
Step-by-step explanation:
C: 2/5 inches is your answer
if 2 inches are 60 miles then 12 miles is a fifth of 2 inches.
1. Each term in this polynomial has a common factor of
:
![12x^6-9x^4+18x^3=3x^3(4x^3-3x+6)](https://tex.z-dn.net/?f=12x%5E6-9x%5E4%2B18x%5E3%3D3x%5E3%284x%5E3-3x%2B6%29)
2. Not sure what the "vertical method" is, but I would guess it refers to some way of visualizing the distributive property.
![(3x-5)(2x^2+7x-3)=3x(2x^2+7x-3)-5(2x^2+7x-3)](https://tex.z-dn.net/?f=%283x-5%29%282x%5E2%2B7x-3%29%3D3x%282x%5E2%2B7x-3%29-5%282x%5E2%2B7x-3%29)
![(3x-5)(2x^2+7x-3)=(6x^3+21x^2-9x)+(-10x^2-35x+15)](https://tex.z-dn.net/?f=%283x-5%29%282x%5E2%2B7x-3%29%3D%286x%5E3%2B21x%5E2-9x%29%2B%28-10x%5E2-35x%2B15%29)
![(3x-5)(2x^2+7x-3)=6x^3+11x^2-44x+15](https://tex.z-dn.net/?f=%283x-5%29%282x%5E2%2B7x-3%29%3D6x%5E3%2B11x%5E2-44x%2B15)
3. You can use the same approach as in (2), or recall that
:
![(5x-4y)^2=(5x)^2+2(5x)(-4y)+(-4y)^2](https://tex.z-dn.net/?f=%285x-4y%29%5E2%3D%285x%29%5E2%2B2%285x%29%28-4y%29%2B%28-4y%29%5E2)
![(5x-4y)^2=25x^2-40xy+16y^2](https://tex.z-dn.net/?f=%285x-4y%29%5E2%3D25x%5E2-40xy%2B16y%5E2)
4. Recall that a difference of squares can be factored as
. So
![(2x^2-7)(2x^2+7)=(2x^2)^2-7^2](https://tex.z-dn.net/?f=%282x%5E2-7%29%282x%5E2%2B7%29%3D%282x%5E2%29%5E2-7%5E2)
![(2x^2-7)(2x^2+7)=4x^4-49](https://tex.z-dn.net/?f=%282x%5E2-7%29%282x%5E2%2B7%29%3D4x%5E4-49)