Answer:
$340
Step-by-step explanation:
Given data
Inititial fee= $100
cost per minute= $1
Let the total charge for x minutes by y
Hence the expression for the total charges after x minutes is
y= 100+1x
y=100+x
But an after is from 12pm - 4pm= 4 hours
x=4*60
x=240minutes
y=100+240
y=$340
Answer:
The first option ,f^-1(x)=1/2*x-1/2
Step-by-step explanation:
f(x)=2x+1
y=2x+1
Interchanging the places of x and y, we get,
x=2y+1
(x-1)/2=y
f^-1(x)=(x-1)/2
f^-1(x)=1/2*x-1/2
The first option.
7) 5x + 16.50 = 59
-16.50 -16.50 (Subtract 16.50 from both sides)
5x = 42.50
/5 /5 (Divide by 5 on both sides)
x = $8.50
8) 4 + 3x = 67
-4 -4
3x = 63
/3 /3
x = 21 stuffed animals
9) 20 + 3x = -4
-20 -20
3x = -24
/3 /3
x = -8
10) 18.9 - 2x = 9.9
-18.9 -18.9
-2x = -9
/-2 /-2
x = 4.5
(I'm not completely sure on number 10, but I hope this helps!)
All u do is 25- 18= 7 a number in parentheses means multiply