Answer:
d. cost will never be the same
Step-by-step explanation:
power plus: 34.37x + 21
heavy hulk: 34.62x + 33.50 (1/2 fee: 34.62x + 16.75)
*set expressions equal to each other*
34.37x + 21 = 34.62x + 16.75 --> *subtract 34.37x from both sides*
21 = .25x + 16.75 --> *subtract 16.75 from both sides*
4.5 = .25x *divide by .25 on both sides*
18 = x
*find y by plugging in 18 for x*
34.37 (18) + 21 = 34.62 (18) + 16.75
618.66 + 21 = 623.16 + 16.75
639.66 = 639.91
<u><em>they don't equal</em></u>
If you mean
, then the answer is 3.
In fact, rational exponents work like this:
![a^{\frac{b}{c}}=\sqrt[c]{a^b}](https://tex.z-dn.net/?f=%20a%5E%7B%5Cfrac%7Bb%7D%7Bc%7D%7D%3D%5Csqrt%5Bc%5D%7Ba%5Eb%7D%20)
So, in your case,
![27^{\frac{1}{3}}=\sqrt[3]{27} = 3](https://tex.z-dn.net/?f=%2027%5E%7B%5Cfrac%7B1%7D%7B3%7D%7D%3D%5Csqrt%5B3%5D%7B27%7D%20%3D%203%20)
because 
Sum of two sides of the triangle should be more than 3d side.
n<20+5,
n<25
Third side should be more than difference of two other sides.
n> 20-15
n>5
So, n should be
5<n<25.
32.6 0.61
+3.54 x 0.45
--------- ----------
36.14 305
+ 2440