It is $63 for one ton of concrete, so 3 tons of concrete will be $189
Answer:
The inverse function is 
Step-by-step explanation:
The given function is
.
This function is only invertible on the interval,
.
To find the inverse on this interval, we interchange
and
.

We now make
the subject to get,



But the given interval is
, This implies that,
.

Answer:
a=-1
b=-9
c=9
d=3
e=3
f=2
g=1.5
Step-by-step explanation:
He made an error is step 2
3x + 18 = 2x +8
subtract 2x from each side
x + 18 = 8
Revenue > Cost
R(x) > C(x)
0.50x > 10+0.20x
0.50x-0.20x > 10
0.30x > 10
x > 10/0.30
x > 33.333 which is approximate
Round up to the nearest whole number to get x = 34. You need to sell at least 34 cups of lemonade to have the revenue R(x) be larger than the cost C(x)
Answer: 34