X+4y+x+y= 4x+y=180
simplify by adding like terms
2x+5y= 4x+y=180
Subtract y from each side
2x+4y=4x=180
Subtract 2x from each side
4y=2x=180
y=180/4=45
x=180/2=90
Answer: 1.95$.
19.50 x .9 = 17.55
19.50 - 17.55 = 1.95
Therefore the answer is indeed 1.95$.
Answer:
Step-by-step explanation:
A) Let x represent minutes used, and C represent monthly charge. We are given two (x, C) pairs: (370, 133.00) and (530, 181.00)
We can use these in the 2-point form of the equation for a line.
y = (y2 -y1)/(x2 -x1)(x -x1) +y1
C = (181 -133)/(530 -370)(x -370) +133
C = 48/160(x -370) +133
C = 0.30x -111 +133
C = 0.30x +22
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B) For x = 477 minutes, the charge will be ...
C = 0.30(477) +22 = $165.10 . . . . for 477 minutes
<span>I believe for twelve (12) months.
Site A: $49.95 plus $59.40(4.95 x 12) equals $109.35
Site B: $9.95 x 12 equals $119.40
No, wait that's not right.
Okay, at 8 months, site A is pretty much at $90 (forget the nickels) and site B is $80 so site B is less.
At 7 months, site A is $85 and site B is $70 so site B is less.
At 9 months, site A is $95 and site B is $90 so site B is less.
At 10 months, site A $100 and site B is $100
It's got to be around 10 months somewhere.
Ten months would be $99.45 for site A and $99.50 for site B so B is less.
Eleven months is $104.40 for A and $109.45 for B so now B is more.</span>
