4(60q-190u-13b+17i) you have to factor the polynomials
Answer:
1/2
Step-by-step explanation:
1/2=10/20
We are going to denote the number of additional minutes with
![x](https://tex.z-dn.net/?f=x)
, and the total cost of the call with
![y](https://tex.z-dn.net/?f=y)
.
From PONCO, we know that they charge $1.25 for the first minute, and $0.30 for each additional minute; knowing that our additional minute is
![x](https://tex.z-dn.net/?f=x)
and our total cost of the call is
![y](https://tex.z-dn.net/?f=y)
, we can set up an equation to relate the values:
![1.25+0.30x=y](https://tex.z-dn.net/?f=1.25%2B0.30x%3Dy)
we are going to call this equation (1)
From CowBell, we know that they charge 1.40 for the first minute, and $0.25 for each additional minute. so just like before we can set up an equation to relate the values:
![1.40+0.25x=y](https://tex.z-dn.net/?f=1.40%2B0.25x%3Dy)
We are going to call this equation (2)
Since the total cost
![y](https://tex.z-dn.net/?f=y)
of equations (1) and (2) is the same, we can equate them to find
![x](https://tex.z-dn.net/?f=x)
:
![1.25+0.30x=1.40+0.25x](https://tex.z-dn.net/?f=1.25%2B0.30x%3D1.40%2B0.25x)
![0.05x=0.15](https://tex.z-dn.net/?f=0.05x%3D0.15)
![x= \frac{0.15}{0.05}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B0.15%7D%7B0.05%7D%20)
![x=3](https://tex.z-dn.net/?f=x%3D3)
We can conclude that after 3 additional minutes the cost of the calls will be the same; therefore, the correct answer is
B.
Answer:
x=5 y=-1
Step-by-step explanation:
7x-2y=37
[2(4x+y=19)]=
8x+2y=38
---------------------
15x/15=75/15
x=5
[4(5)+y=19]
y=-1
Answer:
x=0
Step-by-step explanation:
ax^2 =0
that means x^2=0
so, x = 0